# List of Star Trek characters

This article lists characters in the various canonical incarnations of Star Trek. This includes fictional main and major characters created for the franchise.

## Key

| Abbreviation | Title | Date(s) | Medium |
| TC | "The Cage" (Star Trek: The Original Series) | 1966 | TV |
| TOS | Star Trek: The Original Series | 1966–1969 | TV |
| TAS | Star Trek: The Animated Series | 1973–1974 | TV |
| TMP | Star Trek: The Motion Picture | 1979 | film |
| TWOK | Star Trek II: The Wrath of Khan | 1982 | film |
| TSFS | Star Trek III: The Search for Spock | 1984 | film |
| TVH | Star Trek IV: The Voyage Home | 1986 | film |
| TFF | Star Trek V: The Final Frontier | 1989 | film |
| TUC | Star Trek VI: The Undiscovered Country | 1991 | film |
| TNG | Star Trek: The Next Generation | 1987–1994 | TV |
| DS9 | Star Trek: Deep Space Nine | 1993–1999 | TV |
| GEN | Star Trek Generations | 1994 | film |
| VOY | Star Trek: Voyager | 1995–2001 | TV |
| FC | Star Trek: First Contact | 1996 | film |
| INS | Star Trek: Insurrection | 1998 | film |
| NEM | Star Trek: Nemesis | 2002 | film |
| ENT | Star Trek: Enterprise | 2001–2005 | TV |
| ST09 | Star Trek (2009) | 2009 | film |
| STID | Star Trek Into Darkness | 2013 | film |
| STB | Star Trek Beyond | 2016 | film |
| DSC/DIS | Star Trek: Discovery | 2017–2024 | TV |
| SHO | Star Trek: Short Treks | 2018–2020 | TV |
| PIC | Star Trek: Picard | 2020–2023 | TV |
| LOW | Star Trek: Lower Decks | 2020–2024 | TV |
| PRO | Star Trek: Prodigy | 2021–present | TV |
| SNW | Star Trek: Strange New Worlds | 2022–present | TV |

## Main and recurring characters

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* Y
* Z
| Character | Actor(s) | Appearances | Rank | Posting | Position | Species |
| Airiam | Sara Mitich | Seasons 1–2 (DSC) | Lt. Commander | USS Discovery | Science officer | Human cyborg |
| Airiam | Hannah Cheesman | Seasons 1–2 (DSC) | Lt. Commander | USS Discovery | Science officer | Human cyborg |
| Jonathan Archer | Scott Bakula | Seasons 1–4 (ENT) | Captain | Enterprise NX-01 | Commanding officer | Human |
| Asencia | Jameela Jamil | Seasons 1-2 (PRO) | Civilian Ensign | Solum USS Dauntless | Tyrant Navigator | Vau N’Akat |
| Soji Asha | Isa Briones | Seasons 1-2 (PIC) | Civilian | Romulan Reclamation Site | Anthropologist | Android |
| Ayala | Tarik Ergin | Seasons 1–7 (VOY) | Lieutenant, JG (provisional) | USS Voyager | Helmsman (S7) Security officer (S1-7) Maquis (previous) | Human |
| Azan | Kurt Wetherill | Seasons 6–7 (VOY) | Civilian | USS Voyager Passenger | | Wysanti/xB |
| Reginald Barclay | Dwight Schultz | Seasons 3–4,6–7 (TNG) Movies (FCT) Seasons 2,6–7 (VOY) | Lt. Commander (VOY) Lieutenant, JG (TNG, FCT) | Starfleet Command (VOY) USS Enterprise-E (FCT) USS Enterprise-D (TNG) | Pathfinder Project (VOY) Engineering officer (TNG, movies) | Human |
| Bareil Antos | Philip Anglim | Seasons 1–3,6 (DS9) | Vedek | Bajor resident | Bajoran religious leader (S1-3) | Bajoran |
| Julian Bashir | Alexander Siddig | Seasons 1–7 (DS9) Season 6 (TNG) | Lieutenant (S4-7) Lieutenant, JG (S1-3) | Deep Space 9 | Chief medical officer | Human |
| B'Etor | Gwynyth Walsh | Seasons 4–5,7 (TNG) Movies (GEN) Season 1 (DS9) | Commander, Klingon Empire | Bird of Prey | First officer | Klingon |
| Brad Boimler | Jack Quaid | Seasons 1-5 (LOW) Season 2 (SNW) (Those Old Scientists) | Ensign (Seasons 1-3) Lieutenant, JG (Season 4) | USS Cerritos (Seasons 1-4), USS Titan (Season 2) | | Human |
| Cleveland "Book" Booker | David Ajala | Seasons 3-5 (DSC) | Civilian | USS Discovery 1031-A | Courier, Starfleet consultant | Kwejian |
| Boothby | Ray Walston | Season 5 (TNG) Season 5 (VOY) | Civilian | Starfleet Academy | Groundskeeper | Human |
| Borg Queen | Alice Krige | Seasons 5–7 (VOY) Movies (FCT) Season 2 (PIC) | None | Borg Collective | Leader of Borg Collective | Borg |
| Borg Queen | Susanna Thompson | Seasons 5–7 (VOY) Movies (FCT) Season 2 (PIC) | None | Borg Collective | Leader of Borg Collective | Borg |
| Borg Queen | Annie Wersching | Seasons 5–7 (VOY) Movies (FCT) Season 2 (PIC) | None | Borg Collective | Leader of Borg Collective | Borg |
| Phillip Boyce | John Hoyt | "The Cage" | Lt. Commander | USS Enterprise | Chief medical officer | Human |
| Brunt | Jeffrey Combs | Seasons 3–7 (DS9) | Civilian | Ferenginar resident | Ferengi commerce liquidator | Ferengi |
| Ronald Altman Bryce | Ronnie Rowe Jr. | Seasons 1–3 (DSC) | Lieutenant Commander (DSC S4) Lieutenant, JG | USS Curie (DSC S4) USS Discovery | Communications officer | Human |
| Gabrielle Burnham | Sonja Sohn | Seasons 2-3 (DSC) | None | Section 31 | Intelligence operative Astrophysicist | Human |
| Michael Burnham | Sonequa Martin-Green | Seasons 1–5 (DSC) | Captain (S4-5) Commander (S1-3 Crewman (S1) | USS Discovery (S1-2) USS Shenzhou (S1) | Captain (S4-5) First officer (S3) Science officer (S2) Science specialist (S1) First officer (S1) | Human |
| Michael Burnham | Arista Arhin (as a child) | Seasons 1–5 (DSC) | Captain (S4-5) Commander (S1-3 Crewman (S1) | USS Discovery (S1-2) USS Shenzhou (S1) | Captain (S4-5) First officer (S3) Science officer (S2) Science specialist (S1) First officer (S1) | Human |
| Joseph Carey | Josh Clark | Seasons 1,5–7 (VOY) | Lieutenant | USS Voyager | Engineering officer | Human |
| Chakotay | Robert Beltran | Seasons 1-2 (PRO) Seasons 1–7 (VOY) | Captain Commander (provisional) | USS Protostar (PRO S1) USS Voyager S1-7 | Captain (PRO S1) First officer (VOY S1-7) Maquis (S1) | Human |
| Christine Chapel | Majel Barrett | Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, TVH) | Commander (TMP, TVH) Crewman (TOS, TAS) | Starfleet Command (TVH) USS Enterprise (TOS, TAS, TMP) | Starfleet Command officer (TVH) Medical officer (TMP) Nurse (TOS, TAS) | Human |
| Christine Chapel | Jess Bush | Seasons 1-2 (SNW) | Crewman (SNW) | USS Enterprise (SNW) | Nurse (SNW) | Human |
| Pavel Chekov | Walter Koenig | Seasons 2–3 (TOS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, GEN) Season 5 (DS9) | Commander (WOK, SFS, TVH, TFF, TUC, GEN) Lieutenant (TMP) | USS Enterprise-A (TVH, TFF, TUC) USS Reliant (WOK) USS Enterprise (TOS, TMP, SFS) | Chief security officer (SFS, TVH, TFF, TUC) First officer (WOK) Weapons officer (TMP) Navigator (TOS) | Human |
| Pavel Chekov | Anton Yelchin | ST09, STID, STB | Ensign (ST09, STID, STB) | USS Enterprise (ST09, STID, STB) | Navigator (ST09, STID, STB) | Human |
| Una Chin-Riley ('Number One') | Majel Barrett | "The Cage" Season 2 (DSC) Seasons 1-2 (SNW) | Commander Lt. Commander | USS Enterprise | First officer | Illyrian |
| Una Chin-Riley ('Number One') | Rebecca Romijn | "The Cage" Season 2 (DSC) Seasons 1-2 (SNW) | Commander Lt. Commander | USS Enterprise | First officer | Illyrian |
| J. M. Colt | Laurel Goodwin | "The Cage" | Yeoman | USS Enterprise | Yeoman | Human |
| Katrina Cornwell | Jayne Brook | Seasons 1-2 (DSC) | Vice Admiral | Starfleet Command | Admiral of Starfleet | Human |
| Kimara Cretak | Adrienne Barbeau | Season 7 (DS9) | Senator | Deep Space 9 | Romulan representative | Romulan |
| Kimara Cretak | Megan Cole | Season 7 (DS9) | Senator | Deep Space 9 | Romulan representative | Romulan |
| Beverly Crusher | Gates McFadden | Seasons 1,3–7 (TNG) Movies (GEN, FCT, INS, NEM) Season 2 (PRO) Season 3 (PIC) | Admiral Civilian Commander | Starfleet Command SS Eleos XII USS Enterprise-E (FCT, INS, NEM) USS Enterprise-D (S1,3-7, GEN) Starfleet Command (S2) | Head of Starfleet Medical (PIC S5) Civilian doctor associated with the humanitarian organization Mariposas (PIC S5, LOW S4) Chief medical officer (S1, 3–7, movies) Head of Starfleet Medical (S2) | Human |
| Jack Crusher | Ed Speleers | Season 3 (PIC) Season 2 (PRO) | Ensign Civilian | USS Enterprise NCC-1701-G SS Eleos XII | Special counselor to the captain Civilian associated with the humanitarian organization Mariposas | Human |
| Wesley Crusher | Wil Wheaton | Seasons 1–4,5,7 (TNG) Season 2 (PRO) Season 2 (PIC S2) Movies (NEM) | Civilian (PIC S2), (PRO S2) Lieutenant, JG (NEM) Cadet (S4-7) Ensign (S3-4) Ensign (acting) (S1-3) Civilian (S1) | USS Titan (NEM) Starfleet Academy (S4-7) USS Enterprise-D (S1-4) | Traveler (PIC S2) , (PRO S2) Engineering officer (NEM) Starfleet cadet (S4-7) Helmsman (S1-4) | Human |
| Hugh Culber | Wilson Cruz | Season 1–5(DSC) | Commander Lt. Commander | USS Discovery | Doctor | Human |
| Jal Culluh | Anthony De Longis | Seasons 1–3 (VOY) | First Maje | Kazon-Nistrim | Leader of Kazon-Nistrim | Kazon |
| Elizabeth Cutler | Kellie Waymire | Season 1 (ENT) | Crewman | Enterprise NX-01 | Entomologist | Human |
| Leonardo da Vinci | John Rhys-Davies | Seasons 3–4 (VOY) | None | USS Voyager Program | Holographic character | Hologram |
| Damar | Casey Biggs | Seasons 4–7 (DS9) | Legate (S7) Gul (S6-7) Glinn (S4-6) | Cardassia Prime CMS Groumall (S4) | Leader of Cardassian Union (S7) Dominion leader (S6-7) Vigilante (S5) Cardassian officer (S4) | Cardassian |
| Daniels /Kovich | David Cronenberg | Seasons 3-5 (DSC) Seasons 1–4 (ENT) | Federation official Crewman | Federation Headquarters Unknown | Scientist in cognitive science, with specialties in artificial sentience and intelligence Temporal agent | Mostly Human |
| Daniels /Kovich | Matt Winston | Seasons 3-5 (DSC) Seasons 1–4 (ENT) | Federation official Crewman | Federation Headquarters Unknown | Scientist in cognitive science, with specialties in artificial sentience and intelligence Temporal agent | Mostly Human |
| Data | Brent Spiner | Seasons 1–7 (TNG) Movies (GEN, FCT, INS, NEM) Season 1 (PIC) | Lt. Commander | USS Enterprise-E (FCT, INS, NEM) USS Enterprise-D (S1-7, GEN) | Chief operations officer (TNG, GEN, FCT, INS, NEM) | Android |
| Ezri Dax | Nicole de Boer | Season 7 (DS9) | Lieutenant, JG (S7) Ensign (S7) | Deep Space 9 | Counselor | Trill |
| Jadzia Dax | Terry Farrell | Seasons 1–6 (DS9) | Lt. Commander (S4-6) Lieutenant (S1-3) | Deep Space 9 | Chief science officer | Trill |
| Degra | Randy Oglesby | Season 3 (ENT) | Civilian | Xindi Council | Scientist | Xindi-Primate |
| Keyla Detmer | Emily Coutts | Seasons 1–3 (DSC) | Lieutenant (S1-2) Lieutenant, JG (S1) | USS Discovery (S1-2) USS Shenzhou (S1) | Helmsman | Human |
| The Doctor | Robert Picardo | Seasons 1–7 (VOY) | None | USS Voyager | Chief medical officer | Hologram |
| Dolim | Scott MacDonald | Season 3 (ENT) | Commander | Xindi Council | Council member | Xindi-Reptilian |
| Dukat | Marc Alaimo | Seasons 1–7 (DS9) | Gul | Cardassia Prime | Religious leader (S6-7) Leader of Cardassia (S5) Vigilante (S4-5) Freighter commander (S4) Cardassian officer (S1-4) | Cardassian |
| Michael Eddington | Kenneth Marshall | Seasons 3–5 (DS9) | Civilian (S4-5) Lt. Commander (S3-4) | Deep Space 9 (S3-4) | Maquis (S7) Security officer (S5-7) | Human |
| Elnor | Evan Evagora | Seasons 1-2 (PIC) | Cadet (S2) Qowat Milat (S1) | USS Excelsior (S2) Vashti resident (S1) | Starfleet cadet (S2) Qalankhkai to Picard (S1) | Romulan |
| Kova Rin Esmar | Jin Maley | Season 3 (PIC) | Ensign | USS Enterprise NCC-1701-G (PIC S3) USS Titan (NCC-80102-A) (PIC S3) | Communications officer | Haliian |
| Evek | Richard Poe | Season 7 (TNG) Season 2 (DS9) Season 1 (VOY) | Gul | CMS Vetar | Commanding officer | Cardassian |
| Female Changeling | Salome Jens | Seasons 3–4,6–7 (DS9) | None | Cardassia Prime | Leader of Dominion | Changeling |
| Vic Fontaine | James Darren | Seasons 6–7 (DS9) | None | Deep Space 9 Program | Holographic entertainer | Hologram |
| Maxwell Forrest | Vaughn Armstrong | Seasons 1–4 (ENT) | Vice Admiral | Starfleet Command | NX Project | Human |
| Alonzo Freeman | Phil LaMart | Seasons 1-4 (LOW) | Admiral | Starfleet Command | Flag officer | Human |
| Carol Freeman | Dawnn Lewis | Seasons 1-5 (LOW) | Captain | USS Cerritos | Commanding officer | Human |
| Elim Garak | Andrew Robinson | Seasons 1–7 (DS9) | Civilian | Deep Space 9 resident | Tailor | Cardassian |
| Garrison | Adam Roarke | "The Cage" | Chief petty officer | USS Enterprise | Communications officer | Human |
| Philippa Georgiou | Michelle Yeoh | Seasons 1-3 (DSC) Season 1 (S31) | Captain (S1) | NCIA-93 (S2) Section 31 (S1-3) USS Shenzhou (S1) | Intelligence operative (S1-3) Emperor, Mirror Universe (S1) Commanding officer (S1) | Human |
| Sonya Gomez | Lycia Naff | Season 2 (TNG) Season 2 (LOW) | Ensign | USS Enterprise-D | Engineering officer | Human |
| Gowron | Robert O'Reilly | Seasons 4–6 (TNG) Seasons 3–7 (DS9) | Chancellor | Klingon High Council | Chancellor of Klingon Empire | Klingon |
| Amanda Grayson | Jane Wyatt | Season 2 (TOS) Movies (TVH, TFF) | Civilian | Vulcan resident | Teacher | Human |
| Amanda Grayson | Majel Barrett | Seasons 1 (TAS) | Civilian | Vulcan resident | Teacher | Human |
| Amanda Grayson | Winona Ryder | ST09 | Civilian | Vulcan resident | Teacher | Human |
| Amanda Grayson | Mia Kirshner | Season 1 (DSC) Season 2 (SNW) | Civilian | Vulcan resident | Teacher | Human |
| Guinan | Whoopi Goldberg | Seasons 2–6 (TNG) Movies (GEN, NEM) Season 2 (PIC) | Civilian | USS Enterprise-D | Bartender | El-Aurian |
| Gwyndala "Gwyn" | Ella Purnell | Seasons 1-2 (PRO) | Civilian | USS Protostar NX-76884 | Captain (S2) Communications officer (S1) | Vau N'Akat |
| J. Hayes | Steven Culp | Season 3 (ENT) | Major | Enterprise NX-01 | MACO officer | Human |
| Erika Hernandez | Ada Maris | Season 4 (ENT) | Captain | Columbia NX-02 | Commanding officer | Human |
| Hogan | Simon Billig | Seasons 2–3 (VOY) | Ensign (provisional) | USS Voyager | Engineering officer Maquis (previous) | Human |
| Mr. Homn | Carel Struycken | Seasons 1–5 (TNG) | Civilian | Betazed resident | Servant | Unknown |
| Hugh | Jonathan Del Arco | Seasons 5–7 (TNG) Season 1 (PIC) | None | Romulan reclamation site | Borg drone (TNG) Director of Romulan reclamation site (PIC) | Borg (TNG) Human/xB (PIC) |
| Icheb | Manu Intiraymi | Seasons 6–7 (VOY) | Civilian (VOY) | USS Voyager resident (VOY) | Astrometrics (VOY) | Borg (VOY S6) Brunali/xB (VOY S6-7, PIC) |
| Icheb | Casey King | Season 1 (PIC) | Lieutenant (PIC) | USS Coleman (PIC) | Command officer (PIC) | Borg (VOY S6) Brunali/xB (VOY S6-7, PIC) |
| Ilthuran/The Diviner | John Noble | Seasons 1-2 (PRO) | Civilian | Solum Tars Lamora | Astronomer Prison colony tyrant | Vau N’Akat |
| Ishka | Cecily Adams | Seasons 3, 5–7 (DS9) | Civilian | Ferenginar resident | Philanthropist | Ferengi |
| Ishka | Andrea Martin | Seasons 3, 5–7 (DS9) | Civilian | Ferenginar resident | Philanthropist | Ferengi |
| Kathryn Janeway | Kate Mulgrew | Seasons 1–7 (VOY) Movies (NEM) Seasons 1-2 (PRO) | Vice Admiral (NEM) Captain (VOY) | Starfleet Command (NEM) USS Dauntless (PRO) USS Voyager (VOY) | Starfleet Admiral (NEM) Commanding officer (VOY) | Human |
| Jannar | Rick Worthy | Season 3 (ENT) | Civilian | Xindi Council | Scientist | Xindi-Arboreal |
| Michael Jonas | Raphael Sbarge | Season 2 (VOY) | Crewman (provisional) | USS Voyager | Engineering officer Maquis (previous) | Human |
| Agnes Jurati | Alison Pill | Seasons 1-2 (PIC) | Civilian | Daystrom Institute | Cyberneticist | Human |
| K'Ehleyr | Suzie Plakson | Seasons 2, 4 (TNG) | Ambassador | Earth resident | Federation Ambassador | Klingon/Human |
| Kes | Jennifer Lien | Seasons 1–4, 6 (VOY) | Civilian | USS Voyager | Medic Aeroponics | Ocampa |
| Harry Kim | Garrett Wang | Seasons 1–7 (VOY) | Ensign | USS Voyager | Chief operations officer | Human |
| Kira Nerys | Nana Visitor | Seasons 1–7 (DS9) | Colonel (S7) Commander (S7) Major (S1-6) | Deep Space 9 | Commanding officer (S7) First officer (S1-7) | Bajoran |
| George Kirk | Chris Hemsworth | ST09 | Captain | USS Kelvin (ST09) | Commanding officer | Human |
| George Samuel "Sam" Kirk Jr. | William Shatner | Season 1(TOS)(Operation -- Annihilate!) Seasons 1–2 (SNW) | Lieutenant, JG | Deneva, USS Enterprise | Xenoanthropologist, research biologist | Human |
| George Samuel "Sam" Kirk Jr. | Dan Jeannotte | Season 1(TOS)(Operation -- Annihilate!) Seasons 1–2 (SNW) | Lieutenant, JG | Deneva, USS Enterprise | Xenoanthropologist, research biologist | Human |
| James T. Kirk | William Shatner | Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, GEN, ST09, STID, STB) Season 5 (DS9) Seasons 1-2 (SNW) | Captain (TOS, TAS, TFF, TUC, GEN, STID, STB) Rear Admiral (TMP, WOK, SFS, TVH) Cadet (ST09)Lieutenant (SNW) | USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TOS, TAS, TMP, WOK, SFS, ST09, STID, STB, SNW) USS Farragut (SNW) | Commanding officer (TOS, TAS, TMP, WOK, SFS, TVH, TFF, TUC, STID, STB) First officer (ST09, SNW) | Human |
| James T. Kirk | Chris Pine | Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, GEN, ST09, STID, STB) Season 5 (DS9) Seasons 1-2 (SNW) | Captain (TOS, TAS, TFF, TUC, GEN, STID, STB) Rear Admiral (TMP, WOK, SFS, TVH) Cadet (ST09)Lieutenant (SNW) | USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TOS, TAS, TMP, WOK, SFS, ST09, STID, STB, SNW) USS Farragut (SNW) | Commanding officer (TOS, TAS, TMP, WOK, SFS, TVH, TFF, TUC, STID, STB) First officer (ST09, SNW) | Human |
| James T. Kirk | Paul Wesley | Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, GEN, ST09, STID, STB) Season 5 (DS9) Seasons 1-2 (SNW) | Captain (TOS, TAS, TFF, TUC, GEN, STID, STB) Rear Admiral (TMP, WOK, SFS, TVH) Cadet (ST09)Lieutenant (SNW) | USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TOS, TAS, TMP, WOK, SFS, ST09, STID, STB, SNW) USS Farragut (SNW) | Commanding officer (TOS, TAS, TMP, WOK, SFS, TVH, TFF, TUC, STID, STB) First officer (ST09, SNW) | Human |
| Kol | Kenneth Mitchell | Season 1 (DSC) | General, Klingon Empire | Klingon High Council | Council Member | Klingon |
| Kor | John Colicos | Season 1 (TOS) Season 1 (TAS) Seasons 2, 4, 7 (DS9) | Dahar Master (DS9) Commander, Klingon Empire (TOS, TAS) | Klingon Defense Force (DS9) IKS Klothos (TOS, TAS) | Defence officer (DS9) Commanding officer (TOS, TAS) | Klingon |
| Kurn | Tony Todd | Seasons 3–5 (TNG) Season 4 (DS9) | Crewman, Bajoran Militia (DS9) Captain, Klingon Empire (TNG) | Deep Space 9 (DS9) IKS Hegh'ta (TNG) | Security officer (DS9) Commanding officer (TNG) | Klingon |
| Alandra La Forge | Mica Burton | Season 3 (PIC) | Ensign | Fleet Museum | Engineer | Human |
| Geordi La Forge | LeVar Burton | Seasons 1–7 (TNG) Movies (GEN, FCT, INS, NEM) Season 5 (VOY) Season 3 (PIC) | Commodore (S3, PIC) Lt. Commander (S3-7, movies) Lieutenant (S2) Lieutenant, JG (S1) | Federation Fleet Museum (S3, PIC) USS Enterprise-E (FCT, INS, NEM) USS Enterprise-D (S1-7, GEN) | Curator (S3, PIC) Chief engineer (S2-7, movies) Helmsman (S1) | Human |
| Sidney La Forge | Ashlei Sharpe Chestnut | Season 3 (PIC) | Lieutenant, JG Ensign | Enterprise NCC-1701-G USS Titan (NCC-80102-A) | Helmsman | Human |
| Laris | Orla Brady | Seasons 1-2 (PIC) | Civilian | Earth resident | Vineyard Manager | Romulan |
| Leeta | Chase Masterson | Seasons 3–7 (DS9) | Civilian | Deep Space 9 resident | Dabo Girl | Bajoran |
| Leland | Alan van Sprang | Season 2 (DSC) | Captain | NCIA-93 Section 31 | Commanding officer Intelligence Operative | Human |
| Li Nalas | Richard Beymer | Season 2 (DS9) | Navarch | Deep Space 9 | Liaison officer | Bajoran |
| Linus | David Benjamin Tomlinson | Seasons 2–3 (DSC) | Lieutenant, JG | USS Discovery | Science officer | Saurian |
| Gabriel Lorca | Jason Isaacs | Season 1 (DSC) | Captain | USS Discovery | Commanding officer | Human |
| Lore | Brent Spiner | Season 3 (PIC) Seasons 1, 4, 6–7 (TNG) | Civilian | | | Android |
| L'Rell | Mary Chieffo | Seasons 1–2 (DSC) | Chancellor | Klingon High Council | Chancellor of Klingon Empire | Klingon |
| Lursa | Barbara March | Seasons 4–5, 7 (TNG) Movies (GEN) Season 1 (DS9) | Captain, Klingon Empire | Bird of Prey | Commanding officer | Klingon |
| Ma’ah | Jon Curry | Seasons 2, 4-5 (LOW) | Captain Helm officer | Bloodwine delivery ship IKF Che'Ta | Captain Helm officer | Klingon |
| Maihar'du | Tiny Ron Taylor | Seasons 1–3, 5–7 (DS9) | Civilian | Ferenginar resident | Attendant to Grand Nagus | Hupyrian |
| Maj'el | Michaela Dietz | Season 2 (PRO) | Ensign | Command division officer, USS Prodigy Starfleet Academy fourth year cadet, USS Voyager | | Vulcan |
| Mallora | Tucker Smallwood | Season 3 (ENT) | Civilian | Xindi Council | Chairman | Xindi-Primate |
| Carol Marcus | Bibi Besch | Movies (WOK, SFS, STID) | Civilian (WOK, SFS) Lieutenant (STID) | Project Genesis (WOK, SFS) USS Enterprise (STID) | Biologist | Human |
| Carol Marcus | Alice Eve | Movies (WOK, SFS, STID) | Civilian (WOK, SFS) Lieutenant (STID) | Project Genesis (WOK, SFS) USS Enterprise (STID) | Biologist | Human |
| Beckett Mariner | Tawny Newsome | Seasons 1-5 (LOW) Season 2 (SNW) (Those Old Scientists) | Ensign (Seasons 1-3) Lieutenant, JG (Season 4) | USS Cerritos | | Human |
| Martok | J. G. Hertzler | Seasons 4–7 (DS9) | Chancellor (S7) General, Klingon Empire (S4-7) | Deep Space 9 IKS Rotarran | Chancellor of Klingon Empire (S7) Commander of Klingon Forces (S4-7) | Klingon |
| Travis Mayweather | Anthony Montgomery | Seasons 1–4 (ENT) | Ensign | Enterprise NX-01 | Helmsman | Human |
| Joseph M'Benga | Booker Bradshaw | Seasons 2-3 (TOS) Seasons 1–2 (SNW) | Commander | USS Enterprise | Doctor Chief medical officer, | Human |
| Joseph M'Benga | Babs Olusanmokun | Seasons 2-3 (TOS) Seasons 1–2 (SNW) | Commander | USS Enterprise | Doctor Chief medical officer, | Human |
| Rukiya M'Benga | Sage Arrindell | Season 1 (SNW) | Civilian | USS Enterprise | Civilian | Human |
| Rukiya M'Benga | Mukambe Simamba | Season 1 (SNW) | Civilian | USS Enterprise | Civilian | Human |
| Leonard McCoy | DeForest Kelley | Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, ST09, STID, STB) Season 1 (TNG) Season 5 (DS9) | Admiral (TNG) Commander (TMP, WOK, SFS, TVH, TFF, TUC) Lt. Commander (TOS, TAS, ST09, STID, STB) | USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TOS, TAS, TMP, WOK, SFS, ST09, STID, STB) | Chief medical officer | Human |
| Leonard McCoy | Karl Urban | Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, ST09, STID, STB) Season 1 (TNG) Season 5 (DS9) | Admiral (TNG) Commander (TMP, WOK, SFS, TVH, TFF, TUC) Lt. Commander (TOS, TAS, ST09, STID, STB) | USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TOS, TAS, TMP, WOK, SFS, ST09, STID, STB) | Chief medical officer | Human |
| Mezoti | Marley S. McClean | Seasons 6–7 (VOY) | Civilian | USS Voyager Passenger | | Norcadian |
| Migleemo | Paul F. Tompkins | Seasons 1-4 (LOW) | Commander? | USS Cerritos | Ship's Counselor | Klowahkan |
| Mila | Julianna McCarthy | Seasons 3,7 (DS9) | Civilian | Cardassia resident | Housekeeper | Cardassian |
| Mora Pol | James Sloyan | Seasons 2,5 (DS9) | Civilian | Bajor resident | Scientist | Bajoran |
| Morn | Mark Allen Shepherd | Seasons 1–7 (DS9) Season 1 (VOY) | Civilian | Deep Space 9 resident | Courier | Lurian |
| Mot | Ken Thorley | Seasons 5–6 (TNG) | Civilian | USS Enterprise-D | Barber | Bolian |
| Harry Mudd | Roger C. Carmel | Seasons 1–2 (TOS) Season 1 (TAS) Season 1 (DSC) Season 1 (ST) | Civilian | | Smuggler | Human |
| Harry Mudd | Rainn Wilson | Seasons 1–2 (TOS) Season 1 (TAS) Season 1 (DSC) Season 1 (ST) | Civilian | | Smuggler | Human |
| Matthew Arliss Mura | Joseph Lee | Season 3 (PIC) | Lieutenant | USS Enterprise NCC-1701-G (PIC S3) USS Titan (NCC-80102-A) (PIC S3) | Tactical officer | Bajoran |
| Murf | Dee Bradley Baker | Season 1 (PRO) | Ensign (S2) Starfleet Academy cadet (S2) Civilian (S1) | USS Protostar NX-76884 | Civilian/Security officer | Mellanoid slime worm |
| Raffi Musiker | Michelle Hurd | Seasons 1-3 (PIC) | Commander (S2) Civilian (S1) | Enterprise NCC-1701-G (S3) Starfleet Intelligence (S3) USS Excelsior (S2) | First officer Undercover intelligence agent Chief operations officer (S2) | Human |
| Narek | Harry Treadaway | Season 1 (PIC) | Zhat Vash Operative | | | Romulan |
| Naya | Victoria Sawal | Season 5 (DSC) | Lieutenant | USS Discovery NCC 1031-A (DSC S5) | Operations officer | Human |
| Alynna Nechayev | Natalia Nogulich | Seasons 6–7 (TNG) Seasons 2–3 (DS9) | Fleet Admiral | Starfleet Command | Admiral of Starfleet | Human |
| Neelix | Ethan Phillips | Seasons 1–7 (VOY) | Ambassador (S7) Civilian (S1-7) | Talaxian Asteroid Colony (S7) USS Voyager (S1-7) | Federation Ambassador (S7) Chef (S1-7) | Talaxian |
| Nhan | Rachael Ancheril | Seasons 2-3 (DSC) | Commander | USS Discovery (S2-3) USS Enterprise (S2) | Chief security officer | Barzan |
| Susan Nicoletti | Christine Delgado | Seasons 1–4,7 (VOY) | Lieutenant, JG | USS Voyager | Engineering officer | Human |
| Eva Nilsson | Sara Mitich | Seasons 2-4 (DSC) | Lieutenant | USS Voyager NCC 74656 (DSC S5) USS Discovery | Operations officer | Human |
| Nog | Aron Eisenberg | Seasons 1–7 (DS9) | Lieutenant, JG (S7) Ensign (S6-7) Cadet (S4-5) Civilian (S1-4) | Deep Space 9 Starfleet Academy (S4-5) | Operations officer (S6-7) Starfleet cadet (S4-5) Bar employee (S1-4) Student (S1-4) | Ferengi |
| Khan Noonien Singh | Ricardo Montalbán | Season 1 (TOS) Movies (WOK, STID) (SNW S2)) (Tomorrow and Tomorrow and Tomorrow) | Civilian | SS Botany Bay (TOS) | Superhuman | Human Augment |
| Khan Noonien Singh | Benedict Cumberbatch | Season 1 (TOS) Movies (WOK, STID) (SNW S2)) (Tomorrow and Tomorrow and Tomorrow) | Civilian | SS Botany Bay (TOS) | Superhuman | Human Augment |
| Khan Noonien Singh | Desmond Sivan (as a child) | Season 1 (TOS) Movies (WOK, STID) (SNW S2)) (Tomorrow and Tomorrow and Tomorrow) | Civilian | SS Botany Bay (TOS) | Superhuman | Human Augment |
| La'an Noonien-Singh | Christina Chong (primary) Ava Cheung (as a child) | Seasons 1-2 (SNW) | Lieutenant | USS Enterprise | Chief security officer | Human |
| Noum | Jason Alexander | Seasons 1-2 (PRO) | Lietenant | USS Voyager-A USS Dauntless | Ship’s counselor Chief medical officer | Tellarite |
| Kashimuro Nozawa | John Tampoya | Seasons 1–4,7 (VOY) | Ensign | USS Voyager | Operations officer | Human |
| Keiko O'Brien | Rosalind Chao | Seasons 4–6 (TNG) Seasons 1–7 (DS9) | Civilian | Deep Space 9 (DS9) USS Enterprise-D (TNG) | Teacher/Botanist (DS9) Botanist (TNG) | Human |
| Miles O'Brien | Colm Meaney | Seasons 1–7 (TNG) Seasons 1–7 (DS9) | Chief petty officer | Starfleet Academy (DS9 S7) Deep Space 9 (DS9 S1-7) USS Enterprise-D (TNG S1-6) | Academy professor (DS9 S7) Chief of operations (DS9 S1-7) Transporter chief (TNG S2-6) Helmsman (TNG S1) | Human |
| Molly O'Brien | Hana Hatae | Seasons 1–7 (DS9) | Civilian | Deep Space 9 resident | Student | Human |
| Odo | René Auberjonois | Seasons 1–7 (DS9) | Constable (unofficial) | Deep Space 9 | Chief of security | Changeling |
| Alyssa Ogawa | Patti Yasutake | Seasons 3–7 (TNG) Movies (GEN, FCT) | Lieutenant, JG (S7, movies) Ensign (S3-7) | USS Enterprise-E (FCT) USS Enterprise-D (S3-7, GEN) | Nurse | Human |
| Oh | Tamlyn Tomita | Season 1 (PIC) | Commodore | Starfleet Command | Head of Starfleet Security | Vulcan |
| Opaka Sulan | Camille Saviola | Seasons 1–2,4 (DS9) | Kai | Bajor resident | Bajoran religious leader (S1) | Bajoran |
| Joann Owosekun | Oyin Oladejo | Seasons 1–5 (DSC) | Lieutenant, JG | USS Discovery | Operations officer | Human |
| Owen Paris | Warren Munson Richard Herd | Seasons 2,5–7 (VOY) | Admiral | Starfleet Command | Pathfinder Project | Human |
| Tom Paris | Robert Duncan McNeill | Seasons 1–7 (VOY) Season 1 (LOW) | Lieutenant (LOW S1) Lieutenant, JG (S1-7) Ensign (S5-6) | USS Voyager | Helmsman | Human |
| Phlox | John Billingsley | Seasons 1–4 (ENT) | Civilian | Enterprise NX-01 | Chief medical officer | Denobulan |
| Jean-Luc Picard | Patrick Stewart | Seasons 1–7 (TNG) Movies (GEN, FCT, INS, NEM) Season 1 (DS9) Seasons 1-3 (PIC) | Admiral (PIC) Captain (TNG, movies) | Earth resident (PIC) USS Enterprise-E (FCT, INS, NEM) USS Enterprise-D (TNG S1-7, GEN) | Commanding officer (TNG, movies) | Human |
| Renée Picard | Penelope Mitchell | Season 2 (PIC) | Civilian | Europa Mission | NASA Astronaut | Human |
| Christopher Pike | Jeffrey Hunter | "The Cage" Season 1 (TOS) | Admiral (STID) Captain (TC, TOS, ST09, DSC) | Starfleet Command (STID) USS Enterprise (TC, ST09, DSC) | Starfleet Admiral (STID) Commanding officer (TC, ST09, DSC) | Human |
| Christopher Pike | Bruce Greenwood | ST09, STID | Admiral (STID) Captain (TC, TOS, ST09, DSC) | Starfleet Command (STID) USS Enterprise (TC, ST09, DSC) | Starfleet Admiral (STID) Commanding officer (TC, ST09, DSC) | Human |
| Christopher Pike | Anson Mount | Season 2 (DSC) Seasons 1-2 (SNW)re | Admiral (STID) Captain (TC, TOS, ST09, DSC) | Starfleet Command (STID) USS Enterprise (TC, ST09, DSC) | Starfleet Admiral (STID) Commanding officer (TC, ST09, DSC) | Human |
| Jankom Pog | Jason Mantzoukas | Seasons 1-2 (PRO) | Ensign (S2) Starfleet Academy cadet (S2) Civilian (S1) | USS Protostar NX-76884 | Engineer | Tellarite |
| Tracy Pollard | Raven Dauda | Seasons 1–5 (DSC) | Lieutenant, JG | USS Discovery | Medical officer | Human |
| Katherine Pulaski | Diana Muldaur | Season 2 (TNG) | Commander | USS Enterprise-D | Chief medical officer | Human |
| Q | John de Lancie | Seasons 1–4, 6–7 (TNG) Season 1 (DS9) Seasons 2–3, 7 (VOY) Season 1 (LOW) Season 2 (PIC) | None | Q Continuum resident | Q Continuum | Q |
| Quark | Armin Shimerman | Season 7 (TNG) Seasons 1–7 (DS9) Season 1 (VOY) | Civilian | Deep Space 9 resident | Bar Owner | Ferengi |
| Teresa Ramirez | Sol Rodriguez | (PIC S2) | Civilian | Earth resident | Medical doctor associated with the humanitarian organization Mariposas | Human |
| Ricardo Ramirez | Steve Gutierrez | (PIC S2) | Civilian | Earth resident | Student | Human |
| Janice Rand | Grace Lee Whitney | Season 1 (TOS) Movies (TMP, TVH, TUC) Season 3 (VOY) | Commander (TUC) Chief petty officer (TVH) Crewman (TMP) Yeoman (TOS) | USS Excelsior (TUC) Starfleet Command (TVH) USS Enterprise (TOS, TMP) | First officer (TUC) Starfleet Command officer (TVH) Transporter chief (TMP) Yeoman (TOS) | Human |
| Jack Ransom | Jerry O'Connell | Seasons 1-5 (LOW) | Commander | USS Cerritos | First officer | Human |
| Rayner | Callum Keith Rennie | Season 5 (DSC) | Commander Captain | USS Discovery NCC-1031-A USS Antares | First officer Commanding officer | Kellerun |
| Rebi | Cody Wetherill | Seasons 6–7 (VOY) | Civilian | USS Voyager Passenger | | Wysanti/xB |
| Malcolm Reed | Dominic Keating | Seasons 1–4 (ENT) | Lieutenant | Enterprise NX-01 | Tactical officer | Human |
| Dal R'El | Brett Gray | Seasons 1-2 (PRO) | Ensign (S2) Starfleet Academy cadet (S2) Civilian (S1) | USS Protostar NX-76884) | Acting first officer (S2) Captain (S1) | Augment (Artificially created hybrid of many species) |
| Jet Reno | Tig Notaro | Seasons 2-5 (DSC) | Lt. Commander | USS Discovery (S2-3) USS Hiawatha (S2) | Chief Engineer | Human |
| Gen Rhys | Patrick Kwok-Choon | Seasons 1-5 (DSC) | Lieutenant | USS Discovery | Tactical officer | Human |
| William Riker | Jonathan Frakes | Seasons 1–7 (TNG) Movies (GEN, FCT, INS, NEM) Season 2 (VOY) Season 4 (ENT) Seasons 1,3 (PIC) Season 1 (LOW) | Captain pro tem (PIC S3) Captain (NEM, PIC, LOW) Commander (TNG S1-7, movies) | USS Titan (NCC-80102-A) USS Zheng He (PIC S1) USS Titan (NEM, LOW S1) USS Enterprise-E (FCT, INS, NEM) USS Enterprise-D (TNG S1-7, GEN) | Commanding officer (NEM, PIC S1, LOW S1) First officer (TNG S1-7, movies) | Human |
| Laira Rillak | Chelah Horsdal | Seasons 4-5 (DSC) | Civilian | None | President of the United Federation of Planets | Human/Bajoran/Cardassian |
| Cristóbal "Chris" Rios | Santiago Cabrera | Seasons 1-2 (PIC) | Captain (S2) Civilian (S1) | USS Stargazer (S2) La Sirena (S1) | Commanding officer (S2) Civilian Starship Captain (S1) | Human |
| Narissa Rizzo | Peyton List | Season 1 (PIC) | Colonel | | Zhat Vash Operative | Romulan |
| Ro Laren | Michelle Forbes | Seasons 5–7 (TNG) Season 3 (PIC) | Commander (PIC) Lieutenant (S7) Ensign (S5-6) | USS Enterprise-D | Starfleet Intelligence operative (PIC) Maquis (S7) Helmsman (S5-7) | Bajoran |
| Rok-Takh | Rylee Alazraqui | Seasons 1-2 (PRO) | Ensign (S2) Starfleet Academy cadet (S2) Civilian (S1) | USS Protostar NX-76884 | Science officer | Brikar |
| Rom | Max Grodénchik | Seasons 1–7 (DS9) | Grand Nagus (S7) Crewman (S4-7) Civilian (S1-4) | Deep Space 9 | Grand Nagus (S7) Maintenance Engineer (S4-7) Bar employee (1–4) | Ferengi |
| William Ross | Barry Jenner | Seasons 6–7 (DS9) | Vice Admiral | Deep Space 9 | Military commander | Human |
| Michael Rostov | Joseph Will | Seasons 1–2 (ENT) | Crewman | Enterprise NX-01 | Engineering officer | Human |
| Alexander Rozhenko | Jon Paul Steuer | Seasons 4–7 (TNG) Season 6 (DS9) | Crewman, Klingon Empire (DS9) Civilian (TNG) | IKS Rotarran (DS9) | Weapons officer (DS9) | Klingon/Human |
| Alexander Rozhenko | Brian Bonsall | Seasons 4–7 (TNG) Season 6 (DS9) | Crewman, Klingon Empire (DS9) Civilian (TNG) | IKS Rotarran (DS9) | Weapons officer (DS9) | Klingon/Human |
| Alexander Rozhenko | Marc Warden | Seasons 4–7 (TNG) Season 6 (DS9) | Crewman, Klingon Empire (DS9) Civilian (TNG) | IKS Rotarran (DS9) | Weapons officer (DS9) | Klingon/Human |
| Samanthan "Sam" Rutherford | Eugene Cordero | Seasons 1-5 (LOW) | Lieutenant, JG | Ensign | USS Cerritos | Science officer | Human, cybernetically enhanced |
| Saavik | Kirstie Alley | Movies (WOK, SFS, TVH) | Lieutenant, JG | USS Grissom (SFS, TVH) USS Enterprise (WOK) | Science officer (SFS, TVH) Navigator (WOK) | Vulcan/Romulan |
| Saavik | Robin Curtis | Movies (WOK, SFS, TVH) | Lieutenant, JG | USS Grissom (SFS, TVH) USS Enterprise (WOK) | Science officer (SFS, TVH) Navigator (WOK) | Vulcan/Romulan |
| Sarek | Mark Lenard | Season 2 (TOS) Seasons 1 (TAS) Movies (TMP, SFS, TVH, TUC, ST09) Seasons 3, 5 (TNG) Seasons 1–2 (DSC) | Ambassador | Vulcan resident | Federation Ambassador | Vulcan |
| Sarek | Ben Cross | Season 2 (TOS) Seasons 1 (TAS) Movies (TMP, SFS, TVH, TUC, ST09) Seasons 3, 5 (TNG) Seasons 1–2 (DSC) | Ambassador | Vulcan resident | Federation Ambassador | Vulcan |
| Sarek | James Frain | Season 2 (TOS) Seasons 1 (TAS) Movies (TMP, SFS, TVH, TUC, ST09) Seasons 3, 5 (TNG) Seasons 1–2 (DSC) | Ambassador | Vulcan resident | Federation Ambassador | Vulcan |
| Saru | Doug Jones | Seasons 1–5 (DSC) Season 1 (ST) | Commander Captain Federation Ambassador | Federation Headquarters (DSC S5) USS Discovery (S1-3) USS Shenzhou (S1) | Federation Ambassador (DSC S5) First officer (S4-5) Captain (S3) First officer (S1-2) Science officer (S1) | Kelpien |
| Hoshi Sato | Linda Park | Seasons 1–4 (ENT) | Ensign | Enterprise NX-01 | Communications officer | Human |
| Montgomery Scott | James Doohan | Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, GEN, ST09, STID, STB) Season 6 (TNG) Season 5 (DS9) Season 2 (SNW) | Captain (SFS, TVH, TFF, TUC, GEN, TNG) Commander (TMP, WOK) Lt. Commander (TOS, TAS, ST09, STID, STB) Lieutenant, Junior Grade (SNW S2) | USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TOS, TAS, TMP, WOK, SFS, ST09, STID, STB) USS Stardiver | Chief Engineer | Human |
| Montgomery Scott | Simon Pegg | Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, GEN, ST09, STID, STB) Season 6 (TNG) Season 5 (DS9) Season 2 (SNW) | Captain (SFS, TVH, TFF, TUC, GEN, TNG) Commander (TMP, WOK) Lt. Commander (TOS, TAS, ST09, STID, STB) Lieutenant, Junior Grade (SNW S2) | USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TOS, TAS, TMP, WOK, SFS, ST09, STID, STB) USS Stardiver | Chief Engineer | Human |
| Montgomery Scott | Martin Quinn | Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, GEN, ST09, STID, STB) Season 6 (TNG) Season 5 (DS9) Season 2 (SNW) | Captain (SFS, TVH, TFF, TUC, GEN, TNG) Commander (TMP, WOK) Lt. Commander (TOS, TAS, ST09, STID, STB) Lieutenant, Junior Grade (SNW S2) | USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TOS, TAS, TMP, WOK, SFS, ST09, STID, STB) USS Stardiver | Chief Engineer | Human |
| Sela | Denise Crosby | Seasons 4–5 (TNG) | Commander, Romulan Empire | Unknown | Romulan officer | Romulan/Human |
| Seska | Martha Hackett | Seasons 1–3,7 (VOY) | None (S1-3) Ensign (provisional) (S1) | Kazon-Nistrim (S1-3) USS Voyager (S1) | Kazon Affiliate (S1-3) Engineering officer (S1) Science officer (S1) Maquis Infiltrator (previous) | Cardassian |
| Seven of Nine | Jeri Ryan | Seasons 1-3 (PIC) Seasons 4–7 (VOY) | Captain (PIC S3) Commander (PIC S3) Civilian (PIC S1-2) (VOY S4-7) | Enterprise NCC-1701-G (PIC S3) USS Titan (NCC-80102-A) (PIC S3) La Sirena (PIC S2) USS Voyager (VOY S4-7) | Captain (PIC S3) First officer (PIC S3) Vigilante (PIC S1-2) Astrometrics (VOY S4-7)| | Human/xB |
| Shakaar Edon | Duncan Regehr | Seasons 3–5 (DS9) | First Minister | Bajor resident | First Minister of Bajor | Bajoran |
| Liam Shaw | Todd Stashwick | Season 3 (PIC) | Captain | USS Titan (NCC-80102-A) (PIC S3) | Commanding officer | Human |
| Shaxs | Fred Tatasciore | Seasons 1-4 (LOW) | Lieutenant | USS Cerritos | Chief security officer | Bajoran |
| Thy'lek Shran | Jeffrey Combs | Seasons 1–4 (ENT) | General | Kumari | Andorian Imperial Guard | Andorian |
| Jennifer Sh'reyan | Lauren Lapkus | Seasons 1-4 (LOW) | Ensign | USS Cerritos | Counselor | Andorian |
| Silik | John Fleck | Seasons 1–4 (ENT) | Senior official | Suliban Cabal | Terrorist | Suliban |
| Benjamin Sisko | Avery Brooks | Seasons 1–7 (DS9) | Captain (S3-7) Commander (S1-3) | Deep Space 9 | Commanding officer | Human |
| Jake Sisko | Cirroc Lofton | Seasons 1–7 (DS9) | Civilian | Deep Space 9 resident | Journalist (S5-7) Student (S1-5) | Human |
| Jennifer Sisko | Felecia M. Bell | Seasons 1,3–4 (DS9) | Lieutenant (S1) | USS Saratoga (S1) | Starfleet officer (S1) | Human |
| Joseph Sisko | Brock Peters | Seasons 4,6–7 (DS9) | Civilian | Earth resident | Restaurant Owner | Human |
| Sarah Sisko | Deborah Lacey | Season 7 (DS9) | Civilian | Earth resident | Holophotographer | Human |
| Luther Sloan | William Sadler | Seasons 6–7 (DS9) | None | Section 31 | Intelligence Operative | Human |
| Kore Soong | Isa Briones | Season 2 (PIC) | Civilian | Resident of Earth | Traveler | Human |
| Soval | Gary Graham | Seasons 1–4 (ENT) | Ambassador | Earth | Vulcan Ambassador to Earth | Vulcan |
| Spock | Leonard Nimoy | "The Cage" Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, ST09, STID, STB) Season 5 (TNG) Season 5 (DS9) Season 2 (DSC) Season 1 (SNW) | Ambassador (TNG, ST09, STID) Captain (WOK, SFS, TVH) Commander (TC, TOS, TAS, TMP, ST09, STID, STB, DSC) | New Vulcan resident (STID) USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TC, TOS, TAS, TMP, ST09, STID, STB, DSC) Instructor (ST09) | Federation Ambassador (TNG, ST09, STID) First officer (TC, TOS, TAS, movies) Science officer (TC, TOS, TAS, ST09, STID, STB, DSC) | Vulcan/Human |
| Spock | Zachary Quinto | "The Cage" Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, ST09, STID, STB) Season 5 (TNG) Season 5 (DS9) Season 2 (DSC) Season 1 (SNW) | Ambassador (TNG, ST09, STID) Captain (WOK, SFS, TVH) Commander (TC, TOS, TAS, TMP, ST09, STID, STB, DSC) | New Vulcan resident (STID) USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TC, TOS, TAS, TMP, ST09, STID, STB, DSC) Instructor (ST09) | Federation Ambassador (TNG, ST09, STID) First officer (TC, TOS, TAS, movies) Science officer (TC, TOS, TAS, ST09, STID, STB, DSC) | Vulcan/Human |
| Spock | Ethan Peck | "The Cage" Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, ST09, STID, STB) Season 5 (TNG) Season 5 (DS9) Season 2 (DSC) Season 1 (SNW) | Ambassador (TNG, ST09, STID) Captain (WOK, SFS, TVH) Commander (TC, TOS, TAS, TMP, ST09, STID, STB, DSC) | New Vulcan resident (STID) USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TC, TOS, TAS, TMP, ST09, STID, STB, DSC) Instructor (ST09) | Federation Ambassador (TNG, ST09, STID) First officer (TC, TOS, TAS, movies) Science officer (TC, TOS, TAS, ST09, STID, STB, DSC) | Vulcan/Human |
| Paul Stamets | Anthony Rapp | Season 1-5 (DSC) | Commander Lt. Commander (S2) Lieutenant (S1) | USS Discovery | Science officer | Human |
| Lon Suder | Brad Dourif | Seasons 2–3 (VOY) | Crewman (provisional) | USS Voyager | Engineering officer Maquis (previous) | Betazoid |
| Hikaru Sulu | George Takei | Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, ST09, STID, STB) Season 3 (VOY) | Captain (TUC) Commander (WOK, SFS, TVH, TFF) Lt. Commander (TMP) Lieutenant (TOS, TAS, ST09, STID, STB) | USS Excelsior (TUC) USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TOS, TAS, TMP, WOK, SFS, ST09, STID, STB) | Commanding officer (TUC) Helmsman (TOS, TAS, TMP, WOK, SFS, TVH, TFF, ST09, STID, STB) | Human |
| Hikaru Sulu | John Cho | Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, ST09, STID, STB) Season 3 (VOY) | Captain (TUC) Commander (WOK, SFS, TVH, TFF) Lt. Commander (TMP) Lieutenant (TOS, TAS, ST09, STID, STB) | USS Excelsior (TUC) USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TOS, TAS, TMP, WOK, SFS, ST09, STID, STB) | Commanding officer (TUC) Helmsman (TOS, TAS, TMP, WOK, SFS, TVH, TFF, ST09, STID, STB) | Human |
| Enabran Tain | Paul Dooley | Seasons 2–3,5 (DS9) | None | Cardassia resident | Leader of Obsidian Order | Cardassian |
| Adira Tal | Blu del Barrio | Seasons 3-5 (DSC) | Ensign | USS Discovery (S3-5) | Science officer (DSC S3-5) | Human |
| Gray Tal | Ian Alexander | Seasons 3-5 (DSC) | Civilian | Trill (DSC S4-5) USS Discovery (S3-4) | Guardian (DSC S5) Civilian (DSC S3-4) | Trill |
| T'Ana | Gillian Vigman | Seasons 1-5 (LOW) | Commander | USS Cerritos | Chief medical officer | Caitian |
| D'Erika Tendi | Ariel Winter | Seasons 4-5 (LOW) | Civilian | Orion | Head of House Tendi | Orion |
| D'Vana Tendi | Noël Wells | Seasons 1-5 (LOW) | Lieutenant, JG | Ensign | USS Cerritos | Science officer | Orion |
| Sylvia Tilly | Mary Wiseman | Season 1–5 (DSC) Season 1 (ST) | Lieutenant, JG (S3-5) Ensign (S2) Cadet (S1) | Starfleet Academy (S4-5) USS Discovery (S1-4) | Instructor (S4-5) Acting first officer (S3) Engineering officer (S2) Starfleet cadet (S1) | Human |
| T'Lyn | Danielle Ruiz | Seasons 2-5 (LOW) | Lieutenant, JG | USS Cerritos VCF Sh'vhal | Science officer | Vulcan |
| Tomalak | Andreas Katsulas | Seasons 3–4,7 (TNG) | Commander, Romulan Empire | IRW Terix | Commanding officer | Romulan |
| Tora Ziyal | Melanie Smith | Seasons 4–6 (DS9) | Civilian | Deep Space 9 resident | Artist | Bajoran/Cardassian |
| Tora Ziyal | Cyia Batten | Seasons 4–6 (DS9) | Civilian | Deep Space 9 resident | Artist | Bajoran/Cardassian |
| B'Elanna Torres | Roxann Dawson | Seasons 1–7 (VOY) | Lieutenant, JG (provisional) | USS Voyager | Chief Engineer (S1-7) Maquis (S1) | Klingon/Human |
| T'Pau | Celia Lovsky | Season 2 (TOS) (Amok Time) (ENT S4) | Civilian | None | Civilian | Vulcan |
| T'Pau | Kara Zediker | Season 2 (TOS) (Amok Time) (ENT S4) | Civilian | None | Civilian | Vulcan |
| T'Pol | Jolene Blalock | Seasons 1–4 (ENT) | Commander (S4) SubCommander (S1-4) | Enterprise NX-01 | First officer Science officer | Vulcan |
| T'Pring | Arlene Martel | Season 2 (TOS) (Amok Time) (SNW S1-2) | Civilian | None | Civilian | Vulcan |
| T'Pring | Gia Sandhu | Season 2 (TOS) (Amok Time) (SNW S1-2) | Civilian | None | Civilian | Vulcan |
| The Traveler | Eric Menyuk | Seasons 1,4,7 (TNG) | Civilian | Tau Alpha C resident | | Unknown |
| T'Rina | Tara Rosling | Seasons 3-5 (DSC) | Civilian | Ni'Var | President of Ni'Var | Vulcan |
| Deanna Troi | Marina Sirtis | Seasons 1–7 (TNG) Movies (GEN, FCT, INS, NEM) Seasons 6–7 (VOY) Season 4 (ENT) Seasons 1,3 (PIC) Season 1 (LOW) | Commander (TNG S7, VOY, movies) Lt. Commander (TNG S1-7) | USS Titan (NEM) USS Enterprise-E (FCT, INS, NEM) USS Enterprise-D (TNG S1-7, GEN) | Diplomatic officer (NEM) Counselor (TNG S1-7, movies) | Betazoid/Human |
| Lwaxana Troi | Majel Barrett | Seasons 1–5,7 (TNG) Seasons 1,3–4 (DS9) | Ambassador | Betazed resident | Federation Ambassador | Betazoid |
| Kestra Troi-Riker | Lulu Wilson | Season 1 (PIC S1) Nepenthe | Civilian | Nepenthe resident | Student | Human/Betazoid |
| Trip Tucker | Connor Trinneer | Seasons 1–4 (ENT) | Commander | Enterprise NX-01 | Chief Engineer | Human |
| Tuvok | Tim Russ | Seasons 1–7 (VOY) Season 3 (LD) (Grounded) Season 3 (PIC) | Captain (PIC S3) Commander (LD S3) Lt. Commander (S4-7) Lieutenant (S1-4) | Starfleet Command (PIC S3) USS Voyager (VOY S1-7) | Chief of Security | Vulcan |
| Ash Tyler/Voq | Shazad Latif | Seasons 1–2 (DSC) | Lieutenant (S1) | USS Discovery | Chief security officer (S1) | Human/Klingon |
| T'Veen | Stephanie Czajkowski | Season 3 (PIC) | Lieutenant | USS Titan (NCC-80102-A) (PIC S3) | Science officer | Vulcan/Deltan |
| José Tyler | Peter Duryea | "The Cage" | Lieutenant | USS Enterprise | Helmsman | Human |
| Tysess | Daveed Diggs | Seasons 1-2 (PRO) | Commander | USS Voyager-A USS Dauntless | Executive officer | Andorian |
| Nyota Uhura | Nichelle Nichols | Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC) Season 5 (DS9) | Commander (WOK, SFS, TVH, TFF, TUC) Lt. Commander (TMP) Lieutenant (TOS, TAS, ST09, STID, STB) | USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TOS, TAS, TMP, WOK, SFS, ST09, STID, STB) | Communications officer | Human |
| Nyota Uhura | Zoe Saldana | ST09, STID, STB | Commander (WOK, SFS, TVH, TFF, TUC) Lt. Commander (TMP) Lieutenant (TOS, TAS, ST09, STID, STB) | USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TOS, TAS, TMP, WOK, SFS, ST09, STID, STB) | Communications officer | Human |
| Nyota Uhura | Celia Rose Gooding | SNW Seasons 1-2 | Commander (WOK, SFS, TVH, TFF, TUC) Lt. Commander (TMP) Lieutenant (TOS, TAS, ST09, STID, STB) | USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TOS, TAS, TMP, WOK, SFS, ST09, STID, STB) | Communications officer | Human |
| Charles Vance | Oded Fehr | Seasons 3-5 (DSC) | Fleet Admiral (PIC S3-5) | Starfleet Command | Commander-in-chief of Starfleet (DSC S3-5) | Human |
| Vash | Jennifer Hetrick | Seasons 3–4 (TNG) Season 1 (DS9) | Civilian | Earth resident | Archeologist | Human |
| Vorik | Alexander Enberg | Seasons 3–5, 7 (VOY) | Ensign | USS Voyager | Engineering officer | Vulcan |
| Weyoun | Jeffrey Combs | Seasons 4–7 (DS9) | None | Cardassia Prime | Dominion Leader | Vorta |
| Naomi Wildman | Scarlett Pomers | Seasons 2–7 (VOY) | Civilian | USS Voyager resident | Captain's Assistant (unofficial) | Ktarian/Human |
| Samantha Wildman | Nancy Hower | Seasons 2–6 (VOY) | Ensign | USS Voyager | Science officer | Human |
| Winn Adami | Louise Fletcher | Seasons 1–3, 5–7 (DS9) | Kai (S3-7) Vedek (S1-2) | Bajor resident | Bajoran religious leader | Bajoran |
| Worf | Michael Dorn | Seasons 1–7 (TNG) Movies (GEN, FCT, INS, NEM) Seasons 4–7 (DS9) Season 3 (PIC) | Lt. Commander (DS9, movies) Ambassador (DS9 S7) Lieutenant (TNG S3-7) Lieutenant, JG (TNG S1-2) | Starfleet Intelligence (PIC S3) USS Enterprise-E (NEM) Qo'noS (DS9 S7) Deep Space 9 (DS9 S4-7) USS Enterprise-D (S1-7, GEN) | Intelligence operative (PIC S3) Strategic operations officer (DS9 S4-7, movies) Ambassador (DS9 S7) Chief security officer (TNG S2-7) Helmsman (TNG S1) | Klingon |
| Tasha Yar | Denise Crosby | Seasons 1,3,7 (TNG) | Lieutenant | USS Enterprise-D | Chief security officer | Human |
| Kasidy Yates | Penny Johnson Jerald | Seasons 3–7 (DS9) | Captain | SS Xhosa Deep Space 9 resident | Freighter Captain | Human |
| Zek | Wallace Shawn | Seasons 1–3,5–7 (DS9) | Grand Nagus | Ferenginar resident | Leader of Ferengi economics | Ferengi |
| Zero | Angus Imrie | Seasons 1-2 (PRO) | Ensign (S2) Starfleet Academy cadet (S2) Civilian (S1) | USS Protostar NX-76884 | Science officer | Medusan |
| Zhaban | Jamie McShane | Season 1 (PIC) | Civilian | Earth resident | Butler | Romulan |

## Appearances
### Star Trek: The Original Series

    = Main cast (credited)
    = Recurring cast (4+)
    = Guest cast (1-3)
| Actor | Character | Seasons | Seasons | Seasons | Seasons | TAS | TAS | Films | Films | Films | Films | Films | Films | Reboot | Reboot | Reboot |
| Actor | Character | TC | 1 | 2 | 3 | 1 | 2 | I | II | III | IV | V | VI | ST | STID | STB |
| Main cast |||||||||||||||||
| Jeffrey Hunter | Christopher Pike | M | G | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Bruce Greenwood | Christopher Pike | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | S | S | Does not appear |
| Majel Barrett | Number One | M | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Majel Barrett | Christine Chapel | Does not appear | G | R | R | Main | Main | A | Does not appear | Does not appear | A | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Leonard Nimoy | Spock | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | S | A | Does not appear |
| Zachary Quinto | Spock | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Main | Main | Main |
| Laurel Goodwin | J. M. Colt | M | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| John Hoyt | Phillip Boyce | M | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Peter Duryea | José Tyler | M | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| William Shatner | James T. Kirk | Does not appear | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Does not appear | Does not appear | Does not appear |
| Chris Pine | James T. Kirk | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Main | Main | Main |
| DeForest Kelley | Leonard McCoy | Does not appear | R | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Does not appear | Does not appear | Does not appear |
| Karl Urban | Leonard McCoy | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Main | Main | Main |
| James Doohan | Montgomery Scott | Does not appear | Recurring | Recurring | Recurring | Main | Main | Main | Main | Main | Main | Main | Main | Does not appear | Does not appear | Does not appear |
| Simon Pegg | Montgomery Scott | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Main | Main | Main |
| Nichelle Nichols | Nyota Uhura | Does not appear | Recurring | Recurring | Recurring | Main | Main | Main | Main | Main | Main | Main | Main | Does not appear | Does not appear | Does not appear |
| Zoe Saldana | Nyota Uhura | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Main | Main | Main |
| George Takei | Hikaru Sulu | Does not appear | Recurring | Recurring | Recurring | Main | Main | Main | Main | Main | Main | Main | Main | Does not appear | Does not appear | Does not appear |
| John Cho | Hikaru Sulu | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Main | Main | Main |
| Walter Koenig | Pavel Chekov | Does not appear | Does not appear | R | R | Does not appear | Does not appear | Main | Main | Main | Main | Main | Main | Does not appear | Does not appear | Does not appear |
| Anton Yelchin | Pavel Chekov | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Main | Main | Main |
| Ricardo Montalbán | Khan Noonien Singh | Does not appear | G | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | M | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Benedict Cumberbatch | Khan Noonien Singh | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | M | Does not appear |
| Recurring/Guest Cast |||||||||||||||||
| Grace Lee Whitney | Janice Rand | Does not appear | R | Does not appear | Does not appear | Does not appear | Does not appear | A | Does not appear | Does not appear | A | Does not appear | A | Does not appear | Does not appear | Does not appear |
| John Winston | Kyle | Does not appear | Recurring | Recurring | Recurring | | Does not appear | Does not appear | A | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Jim Goodwin | John Farrell | Does not appear | G | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Grant Woods | Kelowitz | Does not appear | G | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Michael Barrier | Vincent DeSalle | Does not appear | G | G | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| William Blackburn | Hadley | Does not appear | Recurring | Recurring | Recurring | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Eddie Paskey | Lesley | Does not appear | Recurring | Recurring | Recurring | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| David L. Ross | Galloway | Does not appear | R | R | G | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Roger Holloway | Roger Lemli | Does not appear | Does not appear | R | R | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Frank da Vinci | Brent | Does not appear | Recurring | Recurring | Recurring | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Bruce Hyde | Kevin Thomas Riley | Does not appear | G | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Ron Veto | Harrison | Does not appear | Recurring | Recurring | Recurring | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Mark Lenard | Sarek | Does not appear | Does not appear | G | Does not appear | G | Does not appear | Does not appear | Does not appear | S | S | A | A | Does not appear | Does not appear | Does not appear |
| Ben Cross | Sarek | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | S | Does not appear | Does not appear |
| Jane Wyatt | Amanda Grayson | Does not appear | Does not appear | G | Does not appear | | Does not appear | Does not appear | Does not appear | Does not appear | A | A | Does not appear | Does not appear | Does not appear | Does not appear |
| Winona Ryder | Amanda Grayson | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | S | Does not appear | Does not appear |
| Roger C. Carmel | Harry Mudd | Does not appear | G | G | Does not appear | G | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Kirstie Alley | Saavik | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | S | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Robin Curtis | Saavik | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | S | S | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |

### Star Trek: The Next Generation

    = Main cast (credited)
    = Recurring cast (4+)
    = Guest cast (1-3)
| Actor | Character | Seasons | Seasons | Seasons | Seasons | Seasons | Seasons | Seasons | Films | Films | Films | Films |
| Actor | Character | 1 | 2 | 3 | 4 | 5 | 6 | 7 | GEN | FCT | INS | NEM |
| Main cast |||||||||||||
| Patrick Stewart | Jean-Luc Picard | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main |
| Jonathan Frakes | William Riker | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main |
| LeVar Burton | Geordi La Forge | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main |
| Denise Crosby | Tasha Yar | Main | | Guest | | | | Guest | | | | |
| Michael Dorn | Worf | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main |
| Gates McFadden | Beverly Crusher | Main | | Main | Main | Main | Main | Main | Main | Main | Main | Main |
| Marina Sirtis | Deanna Troi | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main |
| Brent Spiner | Data | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main |
| Wil Wheaton | Wesley Crusher | Main | Main | Main | Main | Guest | | Guest | | | | Guest |
| Recurring cast |||||||||||||
| Majel Barrett | Lwaxana Troi | Guest | Guest | Guest | Guest | Guest | | Guest | | | | |
| John de Lancie | Q | Guest | Guest | Guest | Guest | | Guest | Guest | | | | |
| Colm Meaney | Miles O'Brien | Guest | Recurring | Recurring | Recurring | Recurring | Guest | Guest | | | | |
| Brent Spiner | Lore | Guest | | | Guest | | Guest | Guest | | | | |
| Eric Menyuk | The Traveler | Guest | | | Guest | | | Guest | | | | |
| Carel Struycken | Mr. Homn | Guest | Guest | Guest | Guest | Guest | | | | | | |
| Diana Muldaur | Katherine Pulaski | | Recurring | | | | | | | | | |
| Whoopi Goldberg | Guinan | | Recurring | Recurring | Recurring | Recurring | Recurring | | Guest | | | Guest |
| Lycia Naff | Sonya Gomez | | Guest | | | | | | | | | |
| Robert O'Reilly | Gowron | | | | Guest | Guest | Guest | | | | | |
| Suzie Plakson | K'Ehleyr | | Guest | | Guest | | | | | | | |
| Andreas Katsulas | Tomalak | | | Guest | Guest | | | Guest | | | | |
| Dwight Schultz | Reginald Barclay | | | Guest | Guest | | Guest | Guest | | Guest | | |
| Tony Todd | Kurn | | | Guest | Guest | Guest | | | | | | |
| Rosalind Chao | Keiko O'Brien | | | | Recurring | Recurring | Guest | | | | | |
| Denise Crosby | Sela | | | | Guest | Guest | | | | | | |
| Barbara March | Lursa | | | | Guest | Guest | | Guest | Guest | | | |
| Gwynyth Walsh | B'Etor | | | | Guest | Guest | | Guest | Guest | | | |
| Patti Yasutake | Alyssa Ogawa | | | | Recurring | Recurring | Recurring | Recurring | Guest | Guest | | |
| Brian Bonsall | Alexander Rozhenko | | | | Guest | Recurring | Guest | Guest | | | | |
| Jonathan Del Arco | Hugh of Borg | | | | | Guest | | Guest | | | | |
| Michelle Forbes | Ro Laren | | | | | Recurring | Guest | Guest | | | | |
| Ashley Judd | Robin Lefler | | | | | Guest | | | | | | |
| Ken Thorley | Mot | | | | | Guest | Guest | | | | | |
| Natalia Nogulich | Alynna Nechayev | | | | | | Guest | Guest | | | | |

### Star Trek: Deep Space Nine

    = Main cast (credited)
    = Recurring cast (4+)
    = Guest cast (1-3)
| Actor | Character | Seasons | Seasons | Seasons | Seasons | Seasons | Seasons | Seasons |
| Actor | Character | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Main cast |||||||||
| Avery Brooks | Benjamin Sisko | Main | Main | Main | Main | Main | Main | Main |
| René Auberjonois | Odo | Main | Main | Main | Main | Main | Main | Main |
| Terry Farrell | Jadzia Dax | Main | Main | Main | Main | Main | Main | |
| Cirroc Lofton | Jake Sisko | Main | Main | Main | Main | Main | Main | Main |
| Colm Meaney | Miles O'Brien | Main | Main | Main | Main | Main | Main | Main |
| Armin Shimerman | Quark | Main | Main | Main | Main | Main | Main | Main |
| Alexander Siddig | Julian Bashir | Main | Main | Main | Main | Main | Main | Main |
| Nana Visitor | Kira Nerys | Main | Main | Main | Main | Main | Main | Main |
| Michael Dorn | Worf | | | | Main | Main | Main | Main |
| Nicole de Boer | Ezri Dax | | | | | | | Main |
| Recurring cast |||||||||
| Marc Alaimo | Dukat | Guest | Recurring | Recurring | Recurring | Recurring | Recurring | Recurring |
| Rosalind Chao | Keiko O'Brien | Recurring | Recurring | Guest | Recurring | Recurring | Guest | Guest |
| Aron Eisenberg | Nog | Recurring | Recurring | Recurring | Recurring | Recurring | Recurring | Recurring |
| Max Grodénchik | Rom | Recurring | Recurring | Recurring | Recurring | Recurring | Recurring | Recurring |
| Hana Hatae | Molly O'Brien | Guest | Guest | Guest | Recurring | Guest | Guest | Guest |
| Andrew Robinson | Elim Garak | Guest | Recurring | Recurring | Recurring | Recurring | Recurring | Recurring |
| Mark Allen Shepherd | Morn | Recurring | Recurring | Recurring | Recurring | Recurring | Recurring | Recurring |
| Louise Fletcher | Winn Adami | Guest | Recurring | Guest | | Guest | Guest | Recurring |
| Philip Anglim | Bareil Antos | Guest | Recurring | Guest | | | Guest | |
| Majel Barrett | Lwaxana Troi | Guest | | Guest | Guest | | | |
| Felecia M. Bell | Jennifer Sisko | Guest | | Guest | Guest | | | |
| Camille Saviola | Opaka Sulan | Guest | Guest | | Guest | | | |
| Wallace Shawn | Zek | Guest | Guest | Guest | | Guest | Guest | Guest |
| Tiny Ron Taylor | Maihar'du | Guest | Guest | Guest | | Guest | Guest | Guest |
| John Colicos | Kor | | Guest | | Guest | | | Guest |
| Paul Dooley | Enabran Tain | | Guest | Guest | | Guest | | |
| Julianna McCarthy | Mila | | | Guest | | | | Guest |
| Natalia Nogulich | Alynna Nechayev | | Guest | Guest | | | | |
| James Sloyan | Mora Pol | | Guest | | | Guest | | |
| Jonathan Frakes | Thomas Riker | | | Guest | | | | |
| Salome Jens | Female Changeling | | | Recurring | Guest | | Recurring | Recurring |
| Penny Johnson Jerald | Kasidy Yates | | | Guest | Recurring | Guest | Guest | Recurring |
| Chase Masterson | Leeta | | | Guest | Guest | Recurring | Recurring | Recurring |
| Kenneth Marshall | Michael Eddington | | | Recurring | Recurring | Guest | | |
| Robert O'Reilly | Gowron | | | Guest | Guest | Guest | | Guest |
| Duncan Regehr | Shakaar Edon | | | Guest | Guest | Guest | | |
| Jeffrey Combs | Brunt | | | Guest | Guest | Guest | Guest | Guest |
| Jeffrey Combs | Weyoun | | | | Guest | Recurring | Recurring | Recurring |
| Casey Biggs | Damar | | | | Guest | Guest | Recurring | Recurring |
| J. G. Hertzler | Martok | | | | Guest | Recurring | Recurring | Recurring |
| Brock Peters | Joseph Sisko | | | | Guest | | Guest | Guest |
| Melanie Smith | Tora Ziyal | | | | Guest | Recurring | Recurring | |
| Cecily Adams | Ishka | | | Guest | | Guest | Guest | Guest |
| James Darren | Vic Fontaine | | | | | | Guest | Recurring |
| Barry Jenner | William Ross | | | | | | Recurring | Recurring |
| William Sadler | Luther Sloan | | | | | | Guest | Guest |
| Marc Worden | Alexander Rozhenko | | | | | | Guest | |
| Deborah Lacey | Sarah Sisko | | | | | | | Recurring |
| John Vickery | Rusot | | | | | | | Recurring |

### Star Trek: Voyager

    = Main cast (credited)
    = Recurring cast (4+)
    = Guest cast (1-3)
| Actor | Character | Seasons | Seasons | Seasons | Seasons | Seasons | Seasons | Seasons |
| Actor | Character | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Main cast |||||||||
| Kate Mulgrew | Kathryn Janeway | Main | Main | Main | Main | Main | Main | Main |
| Robert Beltran | Chakotay | Main | Main | Main | Main | Main | Main | Main |
| Roxann Dawson | B'Elanna Torres | Main | Main | Main | Main | Main | Main | Main |
| Robert Duncan McNeill | Tom Paris | Main | Main | Main | Main | Main | Main | Main |
| Jennifer Lien | Kes | Main | Main | Main | Main | | Main | |
| Ethan Phillips | Neelix | Main | Main | Main | Main | Main | Main | Main |
| Robert Picardo | The Doctor | Main | Main | Main | Main | Main | Main | Main |
| Tim Russ | Tuvok | Main | Main | Main | Main | Main | Main | Main |
| Garrett Wang | Harry Kim | Main | Main | Main | Main | Main | Main | Main |
| Jeri Ryan | Seven of Nine | | | | Main | Main | Main | Main |
| Recurring cast |||||||||
| Josh Clark | Joe Carey | Recurring | | | | Guest | Guest | Guest |
| Anthony De Longis | Jal Culluh | Guest | Recurring | Guest | | | | |
| Martha Hackett | Seska | Recurring | Recurring | Guest | | | | Guest |
| Derek McGrath | Chell | Guest | | | | | | Guest |
| Simon Billig | Hogan | | Recurring | Guest | | | | |
| John de Lancie | Q | | Guest | Guest | | | | Guest |
| Brad Dourif | Lon Suder | | Guest | Guest | | | | |
| Richard Herd | Owen Paris | | Guest | | | Guest | Guest | Guest |
| Nancy Hower | Samantha Wildman | | Recurring | Guest | Guest | Guest | Guest | |
| Scarlett Pomers | Naomi Wildman | | Guest | Guest | Guest | Recurring | Recurring | Guest |
| Raphael Sbarge | Michael Jonas | | Recurring | | | | | |
| Dwight Schultz | Reginald Barclay | | Guest | | | | Guest | Recurring |
| Susan Patterson | Kaplan | | | Recurring | | | | |
| Alexander Enberg | Vorik | | | Guest | Guest | Guest | | Guest |
| John Rhys-Davies | Leonardo da Vinci | | | Guest | Guest | | | |
| Martin Rayner | Doctor Chaotica | | | | | Guest | | Guest |
| Susanna Thompson | Borg Queen | | | | | Guest | Guest | Guest |
| Manu Intiraymi | Icheb | | | | | | Recurring | Recurring |
| Marley S. McClean | Mezoti | | | | | | Recurring | Guest |
| Zoe McLellan | Tal Celes | | | | | | Guest | |
| Marina Sirtis | Deanna Troi | | | | | | Guest | Guest |
| Cody Wetherill | Rebi | | | | | | Recurring | Guest |
| Kurt Wetherill | Azan | | | | | | Recurring | Guest |

### Star Trek: Enterprise

    = Main cast (credited)
    = Recurring cast (4+)
    = Guest cast (1-3)
| Actor | Character | Season | Season | Season | Season | Ref |
| Actor | Character | 1 | 2 | 3 | 4 | Ref |
| Main cast |||||||
| Scott Bakula | Jonathan Archer | Main | Main | Main | Main | |
| Jolene Blalock | T'Pol | Main | Main | Main | Main | |
| John Billingsley | Phlox | Main | Main | Main | Main | |
| Dominic Keating | Malcolm Reed | Main | Main | Main | Main | |
| Anthony Montgomery | Travis Mayweather | Main | Main | Main | Main | |
| Linda Park | Hoshi Sato | Main | Main | Main | Main | |
| Connor Trinneer | Charles "Trip" Tucker III | Main | Main | Main | Main | |
| Recurring cast |||||||
| Vaughn Armstrong | Maxwell Forrest | Recurring | Recurring | | Recurring | |
| Jeffrey Combs | Thy'lek Shran | Guest | Guest | Guest | Recurring | |
| Jim Fitzpatrick | Marcus Williams | Guest | Guest | | Guest | |
| John Fleck | Silik | Recurring | Guest | | Guest | |
| Gary Graham | Soval | Guest | Recurring | Guest | Recurring | |
| James Horan | Humanoid figure | Recurring | Guest | | | |
| Kellie Waymire | Elizabeth Cutler | Recurring | | | | |
| Joseph Will | Michael Rostov | Guest | Guest | | | |
| Matt Winston | Daniels | Guest | Guest | Recurring | Guest | |
| Daniel Riordan | Duras | | Guest | | | |
| Nathan Anderson | N. Kemper | | | Guest | | |
| Molly Brink | Talas | | | Guest | Guest | |
| Steven Culp | J. Hayes | | | Recurring | | |
| Daniel Dae Kim | D. Chang | | | Recurring | | |
| Ken Lally | Taylor | | | Guest | | |
| Scott MacDonald | Dolim | | | Recurring | | |
| Sean McGowan | F. Hawkins | | | Recurring | | |
| Randy Oglesby | Degra | | | Recurring | | |
| Tucker Smallwood | Xindi Primate Councillor | | | Recurring | | |
| Rick Worthy | Jannar | | | Recurring | | |
| Joanna Cassidy | T'Les | | | | Recurring | |
| Ada Maris | Erika Hernandez | | | | Recurring | |
| Derek Magyar | Kelby | | | | Recurring | |
| Kara Zediker | T'Pau | | | | Guest | |
| Eric Pierpoint | Harris | | | | Recurring | |
| Michael Reilly Burke | Koss | | | | Recurring | |

### Star Trek: Discovery

    = Main cast (credited)
    = Recurring cast (3+)
    = Guest cast (1-2)
| Actor | Character | Seasons | Seasons | Seasons | Seasons | Seasons |
| Actor | Character | 1 | 2 | 3 | 4 | 5 |
| Main cast |||||||
| Sonequa Martin-Green | Michael Burnham | Main | Main | Main | Main | Main |
| Doug Jones | Saru | Main | Main | Main | Main | Main |
| Shazad Latif | Voq | Recurring | Does not appear | Does not appear | Does not appear | Does not appear |
| Shazad Latif | Ash Tyler | Main | Main | Does not appear | Does not appear | Does not appear |
| Anthony Rapp | Paul Stamets | Main | Main | Main | Main | Main |
| Mary Wiseman | Sylvia Tilly | Main | Main | Main | Main | Main |
| Jason Isaacs | Gabriel Lorca | Main | Does not appear | Does not appear | Does not appear | Does not appear |
| Wilson Cruz | Hugh Culber | Recurring | Main | Main | Main | Main |
| Anson Mount | Christopher Pike | Does not appear | Main | Does not appear | Does not appear | Does not appear |
| Rachael Ancheril | Nhan | Does not appear | Recurring | Main | Guest | Guest |
| David Ajala | Cleveland "Book" Booker | Does not appear | Does not appear | Main | Main | Main |
| Tig Notaro | Jett Reno | Does not appear | Recurring | Recurring | Main | Main |
| Blu del Barrio | Adira Tal | Does not appear | Does not appear | Recurring | Main | Main |
| Callum Keith Rennie | Rayner | Does not appear | Does not appear | Does not appear | Does not appear | Main |
| Recurring cast |||||||
| Michelle Yeoh | Philippa Georgiou | Recurring | Recurring | Recurring | Does not appear | Does not appear |
| Emily Coutts | Keyla Detmer | Recurring | Recurring | Recurring | Recurring | Recurring |
| Oyin Oladejo | Joann Owosekun | Recurring | Recurring | Recurring | Recurring | Recurring |
| Patrick Kwok-Choon | Gen Rhys | Recurring | Recurring | Recurring | Recurring | Recurring |
| Ronnie Rowe Jr. | R.A. Bryce | Recurring | Recurring | Recurring | Recurring | Guest |
| Mary Chieffo | L'Rell | Recurring | Recurring | Does not appear | Does not appear | Does not appear |
| James Frain | Sarek | Recurring | Recurring | Does not appear | Does not appear | Does not appear |
| Jayne Brook | Katrina Cornwell | Recurring | Recurring | Does not appear | Does not appear | Does not appear |
| Kenneth Mitchell | Kol | Recurring | Does not appear | Does not appear | Does not appear | Does not appear |
| Kenneth Mitchell | Kol-sha | Does not appear | Guest | Does not appear | Does not appear | Does not appear |
| Kenneth Mitchell | Tenavik | Does not appear | Guest | Does not appear | Does not appear | Does not appear |
| Kenneth Mitchell | Aurellio | Does not appear | Does not appear | Guest | Does not appear | Does not appear |
| Rainn Wilson | Harry Mudd | Guest | Does not appear | Does not appear | Does not appear | Does not appear |
| Rekha Sharma | Ellen Landry | Recurring | Does not appear | Guest | Does not appear | Does not appear |
| Sara Mitich | Airiam | Recurring | Does not appear | Does not appear | Does not appear | Does not appear |
| Hannah Cheesman | Airiam | Does not appear | Recurring | Guest | Does not appear | Guest |
| Sara Mitich | Nilsson | Does not appear | Recurring | Recurring | Recurring | Does not appear |
| Mia Kirshner | Amanda Grayson | Guest | Recurring | Does not appear | Does not appear | Does not appear |
| Ethan Peck | Spock | Does not appear | Recurring | Archive | Does not appear | Does not appear |
| Raven Dauda | Tracy Pollard | Guest | Recurring | Recurring | Recurring | Guest |
| David Benjamin Tomlinson | Linus | Does not appear | Recurring | Recurring | Recurring | Recurring |
| Rebecca Romijn | Number One | Does not appear | Recurring | Does not appear | Does not appear | Does not appear |
| Alan van Sprang | Leland | Does not appear | Recurring | Does not appear | Does not appear | Does not appear |
| Sonja Sohn | Gabrielle Burnham | Does not appear | Recurring | Guest | Guest | Does not appear |
| Oded Fehr | Charles Vance | Does not appear | Does not appear | Recurring | Recurring | Recurring |
| Ian Alexander | Gray Tal | Does not appear | Does not appear | Recurring | Recurring | Guest |
| David Cronenberg | Kovich | Does not appear | Does not appear | Recurring | Recurring | Recurring |
| Annabelle Wallis (voice) | Zora | Does not appear | Does not appear | Recurring | Recurring | Recurring |
| Durban and Leeu | Grudge | Does not appear | Does not appear | Recurring | Recurring | Recurring |
| Vanessa Jackson | Audrey Willa | Does not appear | Does not appear | Recurring | Guest | Does not appear |
| Noah Averbach-Katz | Ryn | Does not appear | Does not appear | Recurring | Does not appear | Does not appear |
| Janet Kidder | Osyraa | Does not appear | Does not appear | Recurring | Does not appear | Does not appear |
| Tara Rosling [de] | T'Rina | Does not appear | Does not appear | Guest | Recurring | Recurring |
| Chelah Horsdal | Laira Rillak | Does not appear | Does not appear | Does not appear | Recurring | Guest |
| Orville Cummings | Christopher | Does not appear | Does not appear | Does not appear | Recurring | Recurring |
| Shawn Doyle | Ruon Tarka | Does not appear | Does not appear | Does not appear | Recurring | Does not appear |
| Elias Toufexis | Cold | Guest | Does not appear | Does not appear | Does not appear | Does not appear |
| Elias Toufexis | L'ak | Does not appear | Does not appear | Does not appear | Does not appear | Recurring |
| Eve Harlow | Moll | Does not appear | Does not appear | Does not appear | Does not appear | Recurring |
| Victoria Sawal | Naya | Does not appear | Does not appear | Does not appear | Does not appear | Recurring |
| Natalie Liconti | Gallo | Does not appear | Does not appear | Does not appear | Does not appear | Recurring |
| Christina Dixon | Asha | Does not appear | Does not appear | Does not appear | Does not appear | Recurring |
| Tony Nappo | Ruhn | Does not appear | Does not appear | Does not appear | Does not appear | Recurring |
| Dorian Grey | Arisar | Does not appear | Does not appear | Does not appear | Does not appear | Recurring |
* ↑ Jeffrey Hunter only appeared in stock footage during the first season. In new material, Pike was played uncredited by Sean Kenney.
* ↑ James Doohan voiced the character in the pilot of the animated series. The character continued to appear throughout the series but did not have any more lines.
* ↑ A young version of the character is played by Jonathan Simpson in Star Trek V: The Final Frontier.
* ↑ Majel Barrett voiced the character in the animated series.
* ↑ Wil Wheaton is in the main cast of the first nine episodes of Season 4, departing in "Final Mission".
* ↑ Alexander was played by Jon Steuer for one episode of Season 4.
* 1 2 Lien is still credited as "Also Starring" following the opening credits in episodes 4.01, 4.02 and 6.23, instead of in the opening credits.
* ↑ The character was played by Warren Munson in Seasons 2 and 5.
* ↑ The character was played by uncredited babies in Seasons 2 and 3 and by Brooke Stephens in season 4.
* ↑ In the series finale, the character was played by Alice Krige.
* 1 2 3 4 5 6 7 credited in the main titles only in episodes in which they appear.
* ↑ Latif is credited as Javid Iqbal in his first three appearances as Voq.
* ↑ Yeoh is credited as a special guest star in the main titles only in episodes in which she appears.

### Star Trek: Picard

    = Main cast (Credited main cast member)
    = Recurring cast (3+ appearances in a season)
    = Guest cast (1-2 appearances per season)
| Actor | Character | Seasons | Seasons | Seasons |
| Actor | Character | 1 | 2 | 3 |
| Main cast |||||
| Patrick Stewart | Jean-Luc Picard | Main | Main | Main |
| Alison Pill | Agnes Jurati / Borg Queen | Main | Main | Does not appear |
| Isa Briones | Soji Asha | Main | Main | Does not appear |
| Isa Briones | Dahj Asha | Main | Does not appear | Does not appear |
| Isa Briones | Sutra | Main | Does not appear | Does not appear |
| Isa Briones | Kore Soong | Does not appear | Main | Does not appear |
| Harry Treadaway | Narek | Main | Does not appear | Does not appear |
| Michelle Hurd | Raffi Musiker | Main | Main | Main |
| Santiago Cabrera | Chris Rios | Main | Main | Does not appear |
| Evan Evagora | Elnor | Main | Main | Does not appear |
| Jeri Ryan | Seven of Nine | Recurring | Main | Main |
| Orla Brady | Laris | Recurring | Main | Guest |
| Orla Brady | Tallinn | Does not appear | Main | Does not appear |
| Brent Spiner | Data | Special guest | Does not appear | Recurring |
| Brent Spiner | Altan Inigo Soong | Special guest | Does not appear | Special guest |
| Brent Spiner | Adam Soong | Does not appear | Main | Does not appear |
| Brent Spiner | Lore | Does not appear | Does not appear | Recurring |
| Ed Speleers | Jack Crusher | Does not appear | Does not appear | Main |
| Recurring cast |||||
| Jonathan Del Arco | Hugh | Recurring | Does not appear | Does not appear |
| Jamie McShane | Zhaban | Recurring | Does not appear | Does not appear |
| Tamlyn Tomita | Commodore Oh | Recurring | Does not appear | Does not appear |
| Peyton List | Narissa | Recurring | Does not appear | Does not appear |
| Rebecca Wisocky | Ramdha | Recurring | Does not appear | Does not appear |
| Annie Wersching | Borg Queen | Does not appear | Recurring | Does not appear |
| John de Lancie | Q | Does not appear | Recurring | Guest |
| Whoopi Goldberg | Guinan | Does not appear | Special guest | Does not appear |
| Ito Aghayere | Guinan | Does not appear | Recurring | Does not appear |
| Penelope Mitchell | Renée Picard | Does not appear | Recurring | Does not appear |
| Sol Rodríguez | Dr. Teresa Ramirez | Does not appear | Recurring | Does not appear |
| Jonathan Frakes | William Riker | Special guest | Does not appear | Recurring |
| Marina Sirtis | Deanna Troi | Guest | Does not appear | Recurring |
| Gates McFadden | Beverly Crusher | Does not appear | Does not appear | Recurring |
| Todd Stashwick | Captain Liam Shaw | Does not appear | Does not appear | Recurring |
| Ashlei Sharpe Chestnut | Sidney La Forge | Does not appear | Does not appear | Recurring |
| Michael Dorn | Worf | Does not appear | Does not appear | Recurring |
| Amanda Plummer | Vadic | Does not appear | Does not appear | Recurring |
| LeVar Burton | Geordi La Forge | Does not appear | Does not appear | Recurring |
| Mica Burton | Alandra La Forge | Does not appear | Does not appear | Recurring |
| Special guests |||||
| Wil Wheaton | Wesley Crusher | Does not appear | Guest | Does not appear |
| Thomas Dekker | Titus Rikka | Does not appear | Does not appear | Guest |
| Daniel Davis | Professor James Moriarty | Does not appear | Does not appear | Guest |
| Michelle Forbes | Commander Ro Laren | Does not appear | Does not appear | Special guest |
| Tim Russ | Tuvok | Does not appear | Does not appear | Special guest |
| Elizabeth Dennehy | Fleet Admiral Elizabeth Shelby | Does not appear | Does not appear | Special guest |
| Alice Krige | Borg Queen | Does not appear | Does not appear | Special guest |
* ↑ Jeri Ryan is credited as a Special Guest Star in Season 1
* 1 2 3 4 5 6 credited as a Special Guest Star
* ↑ Jonathan Del Arco is credited as a Guest Star
* 1 2 Marina Sirtis is credited as a Guest Star in season 1 and as Special Guest Star in season 3

### Star Trek: Lower Decks

    = Main cast (credited main cast member)
    = Recurring cast (3+ appearances in a season)
    = Guest cast (1–2 appearances per season)
| Actor | Character | Seasons | Seasons | Seasons | Seasons | Seasons |
| Actor | Character | 1 | 2 | 3 | 4 | 5 |
| Main cast |||||||
| Tawny Newsome | Beckett Mariner | Main | Main | Main | Main | Main |
| Jack Quaid | Brad Boimler | Main | Main | Main | Main | Main |
| Jack Quaid | William Boimler | Does not appear | Main | Main | Does not appear | Main |
| Noël Wells | D'Vana Tendi | Main | Main | Main | Main | Main |
| Eugene Cordero | Sam Rutherford | Main | Main | Main | Main | Main |
| Eugene Cordero | Red Rutherford | Does not appear | Does not appear | Main | Does not appear | Does not appear |
| Dawnn Lewis | Carol Freeman | Main | Main | Main | Main | Main |
| Jerry O'Connell | Jack Ransom | Main | Main | Main | Main | Main |
| Fred Tatasciore | Shaxs | Main | Main | Main | Main | Main |
| Gillian Vigman | T'Ana | Main | Main | Main | Main | Main |
| Recurring cast |||||||
| Paul Scheer | Andy Billups | Recurring | Recurring | Recurring | Recurring | Recurring |
| Jessica McKenna | Barnes | Recurring | Recurring | Recurring | Recurring | Recurring |
| Ben Rodgers | Steve Stevens | Recurring | Recurring | Guest | Does not appear | Guest |
| Lauren Lapkus | Jennifer Sh'reyan | Guest | Recurring | Recurring | Does not appear | Guest |
| Phil LaMarr | Alonzo Freeman | Guest | Recurring | Recurring | Guest | Guest |
| Carl Tart | Kayshon | Does not appear | Recurring | Recurring | Recurring | Recurring |
| Paul F. Tompkins | Gabers Migleemo | Guest | Guest | Recurring | Recurring | Guest |
| Carlos Alazraqui | Les Buenamigo | Does not appear | Does not appear | Recurring | Does not appear | Does not appear |
| Georgia King | Petra Aberdeen | Does not appear | Does not appear | Recurring | Does not appear | Does not appear |
| Gabrielle Ruiz | T'Lyn | Does not appear | Guest | Guest | Recurring | Recurring |
| Special guests and legacy characters |||||||
| Jonathan Frakes | William Riker | Special guest | Special guest | Does not appear | Does not appear | Does not appear |
| John de Lancie | Q | Special guest | Does not appear | Does not appear | Does not appear | Does not appear |
| Marina Sirtis | Deanna Troi | Special guest | Does not appear | Does not appear | Does not appear | Does not appear |
| Robert Duncan McNeill | Tom Paris | Does not appear | Special guest | Does not appear | Does not appear | Does not appear |
| Robert Duncan McNeill | Nick Locarno | Does not appear | Does not appear | Does not appear | Guest | Does not appear |
| Jeffrey Combs | AGIMUS | Does not appear | Special guest | Special guest | Special guest | Does not appear |
| Alice Krige | Borg Queen | Does not appear | Guest | Does not appear | Does not appear | Does not appear |
| Lycia Naff | Sonya Gomez | Does not appear | Guest | Does not appear | Does not appear | Does not appear |
| Armin Shimerman | Quark | Does not appear | Does not appear | Special guest | Does not appear | Does not appear |
| Nana Visitor | Kira Nerys | Does not appear | Does not appear | Special guest | Does not appear | Does not appear |
| George Takei | Hikaru Sulu | Does not appear | Does not appear | Special guest | Does not appear | Does not appear |
| James Cromwell | Zefram Cochrane | Does not appear | Does not appear | Guest | Does not appear | Does not appear |
| J.G. Hertzler | Martok | Does not appear | Does not appear | Guest | Does not appear | Does not appear |
| Susan Gibney | Leah Brahms | Does not appear | Does not appear | Guest | Does not appear | Does not appear |
| Max Grodénchik | Rom | Does not appear | Does not appear | Does not appear | Special guest | Does not appear |
| Chase Masterson | Leeta | Does not appear | Does not appear | Does not appear | Special guest | Does not appear |
| Wil Wheaton | Wesley Crusher | Does not appear | Does not appear | Does not appear | Special guest | Does not appear |
| Shannon Fill | Sito Jaxa | Does not appear | Does not appear | Does not appear | Guest | Does not appear |
| Brent Spiner | Data | Does not appear | Does not appear | Does not appear | Does not appear | Special Guest |
| Jolene Blalock | T'Pol | Does not appear | Does not appear | Does not appear | Does not appear | Special Guest |
| Andrew J. Robinson | Elim Garak | Does not appear | Does not appear | Does not appear | Does not appear | Special Guest |
| Alexander Siddig | Julian Bashir | Does not appear | Does not appear | Does not appear | Does not appear | Special Guest |
| Garrett Wang | Harry Kim | Does not appear | Does not appear | Does not appear | Does not appear | Special Guest |
| Alfre Woodard | Lily Sloane | Does not appear | Does not appear | Does not appear | Does not appear | Special Guest |
* 1 2 3 In the second season episode "Kayshon, His Eyes Open", Brad Boimler is duplicated by a transporter malfunction while serving on the USS Titan, the original Boimler is tricked by the duplicate Boimler into returning to the Cerritos, and the duplicate Boimler takes on the new name William Boimler (after the Titan's captain, William Riker) and remains onboard the Titan.
* 1 2 In the third season episode "Reflections", Samanthan "Sam" Rutherford's implant is revealed to have been altered to suppress his true personality and memories as "Red" Rutherford", an angry first year recruit in Starfleet who had been working on a secret project with shadowy Starfleet higher-ups before being imprisoned within his own mind, all memories of their own mysterious activities erased.
* ↑ Credited mononymously as "Jolene".

### Star Trek: Prodigy

    = Main cast (credited)
    = Recurring cast (3+)
    = Guest cast (1-2)
| Actor | Character | Seasons | Seasons |
| Actor | Character | 1 | 2 |
| Main cast ||||
| Brett Gray | Dal R'El | Main | Main |
| Ella Purnell | Gwyndala | Main | Main |
| Jason Mantzoukas | Jankom Pog | Main | Main |
| Angus Imrie | Zero | Main | Main |
| Rylee Alazraqui | Rok-Tahk | Main | Main |
| Dee Bradley Baker | Murf | Main | Main |
| Jimmi Simpson | Drednok | Main | Main |
| Jimmi Simpson | The Lorekeeper | Does not appear | Main |
| John Noble | Ilthuran / The Diviner | Main | Main |
| Kate Mulgrew | Kathryn Janeway | Main | Main |
| Robert Beltran | Chakotay | Recurring | Main |
| Robert Picardo | The Doctor | Does not appear | Main |
| Jameela Jamil | Asencia / The Vindicator | Recurring | Main |
| Wil Wheaton | Wesley Crusher | Does not appear | Main |
| Recurring cast ||||
| Jason Alexander | Noum | Recurring | Recurring |
| Daveed Diggs | Tysess | Recurring | Recurring |
| Ronny Cox | Edward Jellico | Guest | Recurring |
| Michaela Dietz | Maj'el | Does not appear | Recurring |
| Sunkrish Bala | Zeph | Does not appear | Recurring |
| Susanne Blakeslee | Kathon | Does not appear | Recurring |
| John Pirkis | Borom | Does not appear | Recurring |
* ↑ Picardo is credited as a guest star in season 2 episode 1, "Into the Breach, Part I", before being upgraded to main cast beginning with episode 2, "Into the Breach, Part II".
* ↑ Jamil is credited as a guest star in season 2 episode 2, "Into the Breach, Part II", before being upgraded to main cast beginning with episode 3, "Who Saves the Saviors".
* ↑ Wheaton is credited as a guest star in season 2 episode 9, "The Devourer of All Things, Part I", before being upgraded to main cast beginning with episode 10, "The Devourer of All Things, Part II".
* ↑ Despite not being credited with the main cast Dietz features in 19 of the 20 episodes in season two, with Maj'el appearing in all episodes except "The Devourer of All Things, Part I", more than any other character outside the main six of the Protostar crew.

### Star Trek: Strange New Worlds

    = Main cast (credited)
    = Recurring cast (3+)
    = Guest cast (1-2)
| Actor | Character | Seasons | Seasons |
| Actor | Character | 1 | 2 |
| Main cast ||||
| Anson Mount | Christopher "Chris" Pike | Main | Main |
| Ethan Peck | Spock | Main | Main |
| Jess Bush | Christine Chapel | Main | Main |
| Christina Chong | La'an Noonien-Singh | Main | Main |
| Celia Rose Gooding | Nyota Uhura | Main | Main |
| Melissa Navia | Erica Ortegas | Main | Main |
| Babs Olusanmokun | Joseph M'Benga | Main | Main |
| Bruce Horak | Hemmer | Main | Guest |
| Rebecca Romijn | Una Chin-Riley / Number One | Main | Main |
| Recurring cast ||||
| Dan Jeannotte | Sam Kirk | Recurring | Recurring |
| Rong Fu | Jenna Mitchell | Recurring | Recurring |
| Gia Sandhu | T'Pring | Recurring | Guest |
| Adrian Holmes | Robert April | Guest | Recurring |
| Melanie Scrofano | Marie Batel | Guest | Recurring |
| Paul Wesley | James T. Kirk | Special guest | Recurring |
| Carol Kane | Pelia | Does not appear | Recurring |
| Special guests and legacy characters ||||
| Matthew Wolf | Montgomery Scott | Voice | Does not appear |
| Martin Quinn | Montgomery Scott | Does not appear | Guest |
| Mia Kirshner | Amanda Grayson | Does not appear | Guest |
| Tawny Newsome | Beckett Mariner | Does not appear | Special guest |
| Jack Quaid | Brad Boimler | Does not appear | Special guest |
| Noël Wells | D'Vana Tendi | Does not appear | Special guest |
| Eugene Cordero | Sam Rutherford | Does not appear | Special guest |
| Jerry O'Connell | Jack Ransom | Does not appear | Special guest |

## Shared cast

Star Trek has an ongoing tradition of actors returning to reprise their roles in other spin-off series. In some instances, actors have portrayed potential ancestors, descendants, or relatives of characters they originated. Characters have also been recast for later appearances.
| Actor(s) | Character | The Original Series (1966–1969) | The Animated Series (1973–1974) | The Next Gene­ration (1987–1994) | Deep Space Nine (1993–1999) | Voyager (1995–2001) | Enter­prise (2001–2005) | Disco­very (2017–present) | Short Treks (2018–2020) | Picard (2020–2023) | Lower Decks (2020–present) | Prodigy (2021–present) | Strange New Worlds (2022–present) | Very Short Treks (2023) |
| William Shatner | James T. Kirk | Main | Main | | Archive footage | | Archive audio | | Archive audio | | | | | |
| Paul Wesley | James T. Kirk | | | | | | | | | | | | Recurring | |
| Jeffrey Hunter | Christopher Pike | Main | | | | | | Archive footage | | | | | | |
| Sean Kenney | Christopher Pike | Guest | | | | | | | | | | | | |
| Anson Mount | Christopher Pike | | | | | | | Main | Guest | | | | Main | |
| Leonard Nimoy | Spock | Main | Main | Guest | Archive footage | | | Archive footage | | | | Archive audio | | |
| Ethan Peck | Spock | | | | | | | Recurring | Guest | | | | Main | Guest |
| DeForest Kelley | Leonard McCoy | Main | Main | Guest | Archive footage | | | | | | | | | |
| James Doohan | Scotty | Co-star | Co-star | Guest | Archive footage | | | | | | | Archive audio | | |
| Carlos Alazraqui | Scotty | | | | | | | | | | | | | Guest |
| Nichelle Nichols | Uhura | Co-star | Co-star | | Archive footage | | | | | | | Archive audio | | |
| Celia Rose Gooding | Uhura | | | | | | | | | | | | Main | Guest |
| George Takei | Hikaru Sulu | Co-star | Co-star | | | Guest | | | Archive audio | | Guest | | | Guest |
| Walter Koenig | Pavel Chekov | Co-star | | | Archive footage | | | | | Guest | | | | |
| Jess Bush | Christine Chapel | | | | | | | | | | | | Main | |
| Majel Barrett | Christine Chapel | Co-star | Co-star | | | | | | | | | | | |
| Majel Barrett | Computer Voice | Recurring | Recurring | Recurring | Recurring | Recurring | Recurring | | | Archive audio | | | | |
| Majel Barrett | Lwaxana Troi | | | Recurring | Recurring | | | | | | | | | |
| Majel Barrett | Una "Number One" Chin-Riley | Guest | | | | | | Archive footage | | | | | | |
| Rebecca Romijn | Una "Number One" Chin-Riley | | | | | | | Recurring | Guest | | | | Main | |
| Grace Lee Whitney | Janice Rand | Recurring | | | | Guest | | | | | | | | |
| Roger C. Carmel | Harry Mudd | Recurring | Guest | | | | | | | | | | | |
| Rainn Wilson | Harry Mudd | | | | | | | Recurring | Guest | | | | | |
| Patrick Stewart | Jean-Luc Picard | | | Main | Guest | | Archive audio | | Archive footage | Main | | | | |
| Jonathan Frakes | William Riker | | | Main | Guest | Guest | Guest | | | Recurring | Guest | | | Guest |
| LeVar Burton | Geordi La Forge | | | Main | | Guest | | | | Recurring | | | | |
| Michael Dorn | Worf | | | Main | Main | | | | | Recurring | | | | |
| Gates McFadden | Beverly Crusher | | | Main | | | | | | Recurring | | Guest | | Guest |
| Marina Sirtis | Deanna Troi | | | Main | | Guest | Guest | | | Recurring | Guest | | | |
| Brent Spiner | Data | | | Main | | | Guest | | | Recurring | Guest | | | |
| Brent Spiner | Arik Soong | | | | | | Guest | | | | | | | |
| Brent Spiner | Altan Inigo Soong | | | | | | | | | Guest | | | | |
| Brent Spiner | Adam Soong | | | | | | | | | Main | | | | |
| Wil Wheaton | Wesley Crusher | | | Main | | | | | | Guest | Guest | Main | | |
| Diana Muldaur | Katherine Pulaski | | | Main | | | | | | | | | | |
| Diana Muldaur | Ann Mulhall | Guest | | | | | | | | | | | | |
| Diana Muldaur | Miranda Jones | Guest | | | | | | | | | | | | |
| John de Lancie | Q | | | Recurring | Guest | Recurring | | | | Recurring | Guest | | | |
| Whoopi Goldberg | Guinan | | | Recurring | | | | | | Guest | | | | |
| Ito Aghayere | Guinan | | | | | | | | | Recurring | | | | |
| Dwight Schultz | Reginald Barclay | | | Recurring | | Recurring | | | | | | | | |
| Jon Paul Steuer | Alexander Rozhenko | | | Guest | | | | | | | | | | |
| Brian Bonsall | Alexander Rozhenko | | | Recurring | | | | | | | | | | |
| James Sloyan | Alexander Rozhenko | | | Guest | | | | | | | | | | |
| Marc Worden | Alexander Rozhenko | | | | Recurring | | | | | | | | | |
| Jonathan Del Arco | Hugh | | | Recurring | | | | | | Recurring | | | | |
| Michelle Forbes | Dara | | | Guest | | | | | | | | | | |
| Michelle Forbes | Ro Laren | | | Recurring | | | | | | Guest | | | | |
| Alice Krige | Borg Queen | | | | | Guest | | | | Guest | Guest | | | |
| Susanna Thompson | Borg Queen | | | | | Recurring | | | | | | | | |
| Annie Wersching | Borg Queen | | | | | | | | | Recurring | | | | |
| René Auberjonois | Odo | | | | Main | | | | | | | Archive audio | | |
| Colm Meaney | Miles O'Brien | | | Recurring | Main | | | | | | | | | |
| Armin Shimerman | Quark | | | Guest | Main | Guest | | | | | Guest | | | Guest |
| Alexander Siddig | Julian Bashir | | | Guest | Main | | | | | | Guest | | | |
| Nana Visitor | Kira Nerys | | | | Main | | | | | | Guest | | | |
| Rosalind Chao | Keiko O'Brien | | | Recurring | Recurring | | | | | | | | | |
| Andrew Robinson | Elim Garak | | | | Recurring | | | | | | Guest | | | |
| Kate Mulgrew | Kathryn Janeway | | | | | Main | | | | | | Main | | |
| Robert Beltran | Chakotay | | | | | Main | | | | | | Main | | |
| Robert Duncan McNeill | Tom Paris | | | | | Main | | | | | Guest | | | |
| Ethan Phillips | Neelix | | | | | Main | | | | | | | | Guest |
| Robert Picardo | The Doctor | | | | Guest | Main | | | | | | Main | | |
| Tim Russ | Tuvok | | | | Guest | Main | | | | Guest | | | | |
| Jeri Ryan | Seven of Nine | | | | | Main | | | | Main | | | | |
| Garrett Wang | Harry Kim | | | | | Main | | | | | Guest | | | |
| Manu Intiraymi | Icheb | | | | | Recurring | | | | | | | | |
| Mark Bennington | Icheb | | | | | Guest | | | | | | | | |
| Casey King | Icheb | | | | | | | | | Guest | | | | |
| Jolene Blalock | T'Pol | | | | | | Main | | | | Guest | | | |
| Connor Trinneer | Trip Tucker | | | | | | Main | | | | | | | Guest |
| Sonequa Martin-Green | Michael Burnham | | | | | | | Main | | | | | | |
| Kyrie Mcalpin | Michael Burnham | | | | | | | | Guest | | | | | |
| Doug Jones | Saru | | | | | | | Main | Guest | | | | | Guest |
| Mary Wiseman | Sylvia Tilly | | | | | | | Main | Guest | | | | | |
| Mark Lenard | Sarek | Guest | Guest | Guest | | | | | | | | | | |
| James Frain | Sarek | | | | | | | Recurring | | | | | | |
| Jane Wyatt | Amanda Grayson | Guest | | | | | | | | | | | | |
| Majel Barrett | Amanda Grayson | | Guest | | | | | | | | | | | |
| Mia Kirshner | Amanda Grayson | | | | | | | Recurring | | | | | Guest | |
| Tawny Newsome | Beckett Mariner | | | | | | | | | | Main | | Guest | |
| Jack Quaid | Brad Boimler | | | | | | | | | | Main | | Guest | |
| Noël Wells | D'Vana Tendi | | | | | | | | | | Main | | Guest | Guest |
| Eugene Cordero | Sam Rutherford | | | | | | | | | | Main | | Guest | |
| Jerry O'Connell | Jack Ransom | | | | | | | | | | Main | | Guest | |
| Angus Imrie | Zero | | | | | | | | | | | Main | | Guest |
| Booker Bradshaw | Joseph M'Benga | Recurring | | | | | | | | | | | | |
| Babs Olusan­mokun | Joseph M'Benga | | | | | | | | | | | | Main | |
| Bruce Horak | Hemmer | | | | | | | | | | | | Main | Guest |
| Arlene Martel | T'Pring | Guest | | | | | | | | | | | | |
| Gia Sandhu | T'Pring | | | | | | | | | | | | Recurring | Guest |
| ↑ Star Trek: Short Treks is a series of short films which do not form a cohesive story. There is no main cast. ↑ Star Trek: Very Short Treks is a series of short films which do not form a cohesive story. There is no main cast. 1 2 3 4 5 6 Appeared in "Trials and Tribble-ations" via archive footage 1 2 Appeared in "These Are the Voyages..." via archive voice over 1 2 Appeared in "Ephraim and Dot" via animation and archive voice footage ↑ Jeffrey Hunter was billed as a starring cast member in pilot episode "The Cage". Appeared in "The Menagerie", Parts I and II, via archive footage. 1 2 Appeared in "If Memory Serves" via archive footage ↑ Sean Kenny appeared in "The Menagerie", Parts I and II. ↑ Anson Mount appeared in Season 2 of Star Trek: Discovery as a main cast member. ↑ Appeared in "If Memory Serves" and "Unification III" via archive footage ↑ DeForest Kelley was billed as a co-star for the first season of the Original Series. ↑ Walter Koenig was billed as a co-star in season 2 of the Original Series. ↑ Koenig played Pavel Chekov's son on Picard. ↑ Appeared in "Children of Mars" via archive footage from "Remembrance" (Picard) ↑ Frakes appeared on Deep Space Nine as Thomas Riker, a clone of William Riker created by a transporter accident. ↑ Michael Dorn joined the cast of Deep Space Nine in "The Way of the Warrior". ↑ Gates McFadden was replaced by Diana Muldaur as the ship's doctor for Season 2 of the Next Generation. ↑ Brent Spiner made an uncredited voice cameo in "These Are the Voyages...". ↑ Wil Wheaton left the cast of the Next Generation in "Final Mission". He appeared in "The Game", "The First Duty", "Parallels" and "Journey's End" as a guest. ↑ For each of her Season 2 appearances, Diana Muldaur was billed Special Guest. ↑ James Sloyan appeared as a future Alexander Rozhenko in "Firstborn". ↑ Alexander Siddig was billed Siddig el Fadil from 1993 to 1995, and for his guest appearance on the Next Generation. ↑ Robert Picardo appeared as a different Emergency Medical Hologram, and as its creator Lewis Zimmerman, in "Doctor Bashir, I Presume?". ↑ Tim Russ appeared in "Through the Looking Glass" as the Mirror Universe analogue of Tuvok. ↑ Jeri Ryan joined the cast of Voyager in "Scorpion, Part II". |||||||||||||||