# List of Star Trek characters (T–Z)

This article lists characters from Star Trek in their various canonical incarnations. This includes fictional major characters and fictional minor characters created for Star Trek, fictional characters not originally created for Star Trek, and real-life persons appearing in a fictional manner, such as holodeck recreations.

## Characters from all series, listed alphabetically
### 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 |
| S31 | Star Trek: Section 31 | 2025 | film |
Bajoran characters are listed by family name, which is stated first.
Joined Trills are listed by the name of the symbiont, which replaces the family name.

### T

| Character | Actor | Appearances | Description |
| Tactics Officer | Peter Parros | A Matter of Honor (TNG) | Klingon officer serving aboard the IKS Pagh in 2365. He escorted William Riker to see Captain Kargan, but kept looking askance at the commander because he'd never seen a human before. Later, in the mess hall, he also admitted that he never knew humans had a sense of humor. Regarding his family, his mother was still living, but his father was killed in battle at Tranome Sar. |
| Tahna Los | Jeffrey Nordling | Past Prologue (DS9) | Bajoran terrorist who comes aboard Deep Space Nine asking for asylum only to escape Cardassian pursuit and begin work on his next attack |
| Taibak | John Fleck | The Mind's Eye (TNG) | Romulan officer and scientist who successfully "conditioned" Geordi La Forge to kill Klingon governor Vagh of Krios, although the assassination failed. Taibak served aboard Commander Sela's Warbird in late 2367, and his "brainwashing" efforts were part of a larger Romulan plot to disrupt the alliance between the Federation and the Klingon Empire. |
| Enabran Tain | Paul Dooley | The Wire (DS9) recurring thereafter | Former head of the Obsidian Order and the father of Elim Garak |
| Juliana Tainer | Fionnula Flanagan | Inheritance (TNG) | A Soong-type android created in the image of Noonien Soong's dying wife, Juliana Soong; at Juliana's death, Noonien transferred his wife's consciousness into the android who awoke believing she was Juliana Soong; later left Noonien, married Pran Tainer and took up residence on planet Atrea IV |
| Tal | Jack Donner | The Enterprise Incident (TOS) | Subcommander of the Romulan fleet that brackets the Enterprise when she "strays" into Romulan space. After Captain Kirk steals the cloaking device and beams back aboard the Enterprise, Tal sets off in pursuit. When his Commander orders him to destroy the Federation starship, he attempts to comply, but fails because Mr. Scott managed to successfully install the cloaking device and render the Enterprise "invisible." |
| Tal Celes | Zoe McLellan | The Haunting of Deck Twelve (VOY) Good Shepherd (VOY) | Bajoran sensor analyst on Voyager, assigned to Astrometrics. Despite her evident insecurity, she later demonstrated bravery, refusing to abandon Janeway in danger. ("Good Shepherd") |
| Taleen | Nancy Youngblut | Displaced (VOY) | Nyrian who explained a new customized habitat to the Voyager crew, as part of the Nyrian's forced relocation scam. |
| Talok | Todd Stashwick | Kir'Shara (ENT) | Romulan agent who posed as a Vulcan major for many years, working with the radical Administrator V'Las of the Vulcan High Command to force reunification between their two peoples. A "very long time" before 2154, Talok served under T'Pol in the Tomed mission. In 2154, V'Las ordered Talok to eradicate the remaining Syrrannites. Talok tracked down Jonathan Archer in Vulcan's Forge and attempted to take the Kir'Shara, but Archer escaped. After V'Las was removed and the Vulcan High Command disbanded, Talok's position was compromised and he was forced to leave Vulcan. |
| Tarcassian Razor Beast | None (Only discussed, never seen.) | Imaginary Friend, Rascals (TNG) | Imaginary friend from the childhood of the enigmatic female El-Aurian bartender Guinan, who ran Ten Forward, the lounge aboard the USS Enterprise-D. The Tarcassian razor beast was a winged, furry animal noted for its spiny wings, and its loping way of locomotion. When Guinan was troubled, she'd talk to it, and she enjoyed imagining that she was curling up on its warm belly. |
| Taris | Carolyn Seymour | Contagion (TNG) | Romulan subcommander of the IRW Haakona. She spotted and chased the USS Yamato NCC-71807 throughout the Romulan Neutral Zone before finally witnessing its destruction due to systems failures. When confronted almost immediately by the Enterprise-D, she denies any involvement in the Yamato's destruction and orders Captain Jean-Luc Picard to leave the Neutral Zone. Later, at Iconia, her "excuse" for having followed the Enterprise-D was to claim the planet for the Romulan Star Empire, but when Commander William Riker points out that neither side can claim anything in the Neutral Zone, she again orders the starship to leave, or else she'll destroy it and the Away Team on Iconia. In truth, Taris is deeply frustrated; earlier, the Haakona tapped into the Yamato's log as it was being transmitted to the Enterprise-D, and has now become crippled by Iconian "malware." When Picard steps onto her ship from the Iconian portal, she blames him for sabotage, but seems satisfied that he'll die when her ship autodestructs. Picard, however, is beamed back to the Enterprise-D, and Riker shares the "memory wipe" solution that Geordi La Forge developed with Taris. |
| Taurik | Alexander Enberg | Lower Decks (TNG) | Vulcan ensign and junior engineer aboard the Enterprise-D. His ideas for improving warp drive operation rankle La Forge at first, but La Forge later sees the merit in Taurik's suggestions and invites him to help test them. |
| Gillian Taylor | Catherine Hicks | TVH | Researcher and tour guide at the Cetacean Institute in Sausalito on Earth during the 1980s who joins a pair of whales bound for the 23rd century |
| Jane Taylor | Kipleigh Brown | The Forgotten (ENT) | EPS control specialist killed in the Xindi attack on the Enterprise in the Azati Prime system |
| Tebok | Marc Alaimo | The Neutral Zone (TNG) | Romulan commander who, in 2364, made the first "official" contact with the Federation after more than 53 years of Romulan isolation. He was primarily charged with discovering why several Romulan outposts along the Neutral Zone had disappeared, but the re-emergence was also orchestrated to show off the Romulans' massive new D'Deridex class "warbird" starships. Tebok ominously proclaimed "we are back" to Captain Picard. |
| Temarek | Elkanah J. Burns | The Vengeance Factor (TNG) | Temarek was an Acamarian Gatherer and a member of Clan Lornak. During treaty negotiations in 2366, he discovered the corpse of Volnoth, who was killed by Sovereign Marouk's servant Yuta because of ancient clan rivalries. |
| Ten Forward Waiter | Randy James | The Outrageous Okona (TNG) recurring thereafter | Uncredited human male who worked in Ten Forward in 2365. He served a drink to a Vulcan science officer while Thadiun Okona was beamed aboard (The Outrageous Okona), served drinks to several people in Ten Forward when Data had a conversation with Kareen Brianon in the bar (The Schizoid Man), served a variety of Klingon food to Commander Riker, who was assigned to serve as first officer on the Klingon Bird-of-Prey IKS Pagh (A Matter Of Honor) and was also working in Ten Forward when Riker tried to show Wesley Crusher how to flirt by "playing" with Guinan and when Riker had a date with a female crewmember (The Dauphin; Pen Pals). |
| Clark Terrell | Paul Winfield | WOK | Captain of the starship Reliant. Controlled by Khan Noonien Singh via a Ceti eel, forcing him to nearly kill Admiral Kirk. Rather than murder a fellow Starfleet officer, he committed suicide. Terrell is also featured in the Star Trek Vanguard book series, along with Dr. Carol Marcus. Together they begin work on the foundations of Project Genesis. |
| Thalen | Josh Drennen Christopher Goodman | Proving Ground (ENT) recurring thereafter | Xindi Primate, assistant to Degra on the Xindi planet-destroying weapon project |
| Thei | Anthony James | The Neutral Zone (TNG) | Romulan subcommander and first officer aboard Commander Tebok's Warbird. With Tebok's permission, he agrees that the Romulans and the Federation should share information regarding the mysterious disappearances of outposts on both sides of the Neutral Zone. |
| Thelev | William O'Connell | Journey to Babel (TOS) | An Orion agent posing as a member of the Andorian delegation to the 2267 "Babel" conference. His mission is to create mutual suspicion among the Federation ambassadors aboard the Enterprise. To that end, he kills Tellarite ambassador Gav and tries to frame Vulcan ambassador Sarek for the crime. Later, he attacks Captain Kirk before being caught and revealed as an Orion. To prevent himself from revealing any further information, he commits suicide by taking poison. |
| Tieran | Leigh McCloskey | Warlord (VOY) | Ilaran tyrant ("autarch") who cheated death by transferring his consciousness to other bodies |
| Janel Tigan | Mikael Salazar | Prodigal Daughter (DS9) | Brother of Ezri Dax |
| Norvo Tigan | Kevin Rahm | Prodigal Daughter (DS9) | Brother of Ezri Dax |
| Yanas Tigan | Leigh Taylor-Young | Prodigal Daughter (DS9) | Mother of Ezri Dax |
| Sylvia Tilly | Mary Wiseman | DSC, "Runaway" (ST) |
| Timicin | David Ogden Stiers | Half a Life (TNG) | Scientist from the planet Kaelon II. Had a romantic relationship with Lwaxana Troi, but was forced to commit ritual suicide (known as Resolution) at the age 60 to comply with his culture's directives. |
| T'Kar | Tim Russ | Invasive procedures (DS9) | T'Kar was a male Klingon alive during the mid to late-24th century. In his adult life, he served as a mercenary and, along with Yeto, was one of two Klingons employed by the Trill Verad to steal the Dax symbiont in the 2370s. |
| T'Klaas | None (Only talked about, never seen.) | Kir'Shara (ENT) | Vulcan student of Surak and one of the first Kolinahr masters. He is entombed beneath the T'Karath Sanctuary. |
| T'Lar | Judith Anderson | SFS | Vulcan high priestess who performed the fal-tor-pan ceremony in which Spock's body and katra (living spirit) were rejoined following his death. |
| T'Lyn | Gabrielle Ruiz | wej Duj (LOW) | Independent-minded Vulcan who defies her commander on the Sh'Vhal and is transferred to Starfleet. |
| T'Mir | Jolene Blalock | Carbon Creek (ENT) | A Vulcan, and T'Pol's second foremother (the Vulcan equivalent of "great-grandmother") who was part of an expedition to Earth in the 1950s, and credited as selling the patent to velcro, 1955, although taking place after the launch of Sputnik, 1957, to further the education of a young boy |
| Toddman | Leon Russom | The Die Is Cast (DS9) | Starfleet vice admiral at Starfleet Security in 2371. After Enabran Tain launched a joint Obsidian Order/Tal Shiar attack on the Founders' homeworld, Toddman ordered Commander Benjamin Sisko to evacuate Starbase Deep Space Nine of all nonessential personnel and put the USS Defiant NX-74205 on standby alert. He believed that when the Jem'Hadar inevitably counterattacked, they wouldn't be too particular about their targets. Toddman denied Sisko permission to take the Defiant into the Gamma Quadrant and look for Odo; Sisko's top priority was to guard Bajor. Later, after learning that Sisko went anyway, Toddman decided to forgo any courts-martial, but, with tongue in cheek, promised to either prosecute or promote Sisko if he pulled a stunt like that again. |
| Tog | Frank Corsentino | Ménage à Troi (TNG) | Ferengi Daimon who became infatuated with Lwaxana Troi, kidnapping her as well as Starfleet officers William Riker and Deanna Troi |
| Tomalak | Andreas Katsulas | The Enemy (TNG) recurring thereafter | Romulan commander, recurring antagonist for Captain Picard and the crew of the Enterprise-D |
| Toman'torax | Brian Thompson | To the Death (DS9) | Jem'Hadar soldier in service of the Dominion |
| Tora Ziyal | Cyia Batten Tracy Middendorf Melanie Smith | Indiscretion (DS9) recurring thereafter | Half Cardassian/half Bajoran daughter of Gul Dukat and Tora Naprem |
| Toral | JD Cullum Rick Pasqualone | Redemption, Parts I and II (TNG), The Sword of Kahless (DS9) | Klingon, illegitimate son of Duras, brother of Lursa and B'Etor. Sought to become Chancellor, leading to the Klingon Civil War. |
| Toreth | Carolyn Seymour | Face of the Enemy (TNG) | Romulan commander of the IRW Khazara. She received the Sotarek Citation for prevailing in a surprise battle with the Klingons. She had no love for the Tal Shiar, particularly because they dragged her father (possibly Commander Konsab) out of his home in the middle of the night, merely for speaking his mind. |
| Torg | Stephen Liska | SFS | Klingon officer aboard Commander Kruge's Bird-of-Prey. He and his boarding party are killed when the Enterprise's self-destruct sequence destroys the Federation starship. He may have been Kruge's first officer, as he assumed the command chair when Kruge was on the surface of Genesis. |
| B'Elanna Torres | Roxann Dawson Jessica Gaona (as Young B'Elanna in Lineage) | Caretaker (VOY) recurring thereafter | Klingon-Human hybrid and former Maquis member who served as Chief Engineer on the USS Voyager, eventually the wife of Tom Paris. |
| Carl Torres | Javier Grajeda | Lineage (VOY) | Uncle of B'Elanna Torres, brother of John Torres |
| Dean Torres | Paul Robert Langdon | Lineage (VOY) | Cousin of B'Elanna Torres, son of Carl Torres |
| Elizabeth Torres | Nicole Sarah Fellows | Lineage (VOY) | Cousin of B'Elanna Torres, daughter of Carl Torres |
| John Torres | Juan Garcia | Lineage (VOY), Author, Author (VOY) | Father of B'Elanna Torres and former husband of Miral |
| Michael Torres | Gilbert R. Leal | Lineage (VOY) | Cousin of B'Elanna Torres, son of Carl Torres |
| Tosin | James Horan | Fair Trade (VOY) | Kolaati trader who dealt in illegal substances near the Nekrit Expanse |
| T'Pan | Joan Stuart Morris | Suspicions (TNG) | Vulcan scientist specializing in subspace morphology |
| T'Pau | Celia Lovsky Betty Matsushita Kara Zediker | Amok Time (TOS), Darkling (VOY), The Forge (ENT) recurring thereafter | Vulcan who led the Syrranite rebellion against the Vulcan High Command, later presided over the Koon-ut-kal-if-fee ceremony in which Spock is forced to fight Captain Kirk after Spock was rejected by his bride-to-be, T'Pring. She is also the only person ever to turn down a seat on the Federation Council. The English pop group T'Pau was named after the character, as was a fictional Vulcan vessel. |
| T'Pol | Jolene Blalock | Broken Bow (ENT) | Commander T'Pol, born 2088. Vulcan female who serves as the science officer aboard the starship Enterprise (NX-01). |
| T'Pring | Arlene Martel Mary Rice Gia Sandhu | Amok Time (TOS), Strange New Worlds (SNW) recurring thereafter | Vulcan female who was bonded to Spock but backed out of her commitments and married Stonn |
| The Traveler | Eric Menyuk | Where No One Has Gone Before (TNG) recurring thereafter | Humanoid from Tau Alpha C with exceptional mental abilities, including mastery over space and time. |
| Travers | | Arena (TOS) | Starfleet commodore assigned to the Earth Observation Outpost on Cestus III. According to Kirk, he "sets a good table." Travers was killed when the Gorn attacked and destroyed the outpost because it infringed on their territory. |
| Trelane | William Campbell | The Squire of Gothos (TOS) | Near-omnipotent being who toyed with the crew of the Enterprise. He proved to be an immature representative of his discorporate species, and very much a "spoiled brat." Bartell LaRue and Barbara Babcock provided the voices of his "parents" in the installment. |
| Trelit | Charles Dennis | Desert Crossing (ENT) | Torothan Chancellor and member of the ruling clan |
| Trevean | Michael Sarrazin | The Quickening (DS9) | Native of the planet Teplan in the Gamma Quadrant who "aided" those on his planet infected with a terminal, painful, and slow-acting disease known as the Teplan Blight by administering them toxic herbs, which killed the patients without pain |
| Deanna Troi | Marina Sirtis | Encounter at Farpoint (TNG) recurring thereafter, GEN, FCT, INS, Pathfinder (VOY) recurring thereafter, NEM, These Are The Voyages... (ENT), Nepenthe (PIC) recurring thereafter, No Small Parts (LOW) | The ship's Counselor aboard the Enterprise-D and -E; she also served on the USS Titan. Half-Betazoid, half-Human, wife of William Riker, mother of Thaddeus and Kestra Troi. |
| Ian Andrew Troi | Amick Byram | Dark Page (TNG) | Husband of Lwaxana Troi, father of Deanna and Kestra Troi. |
| Ian Andrew (Troi II) | R. J. Williams Zachary Benjamin Josh Bell | The Child (TNG) | "Son" of Deanna Troi, (named after her father) fathered by an alien light-entity. After a very short gestation period, 'The Child' grew from infant to an eight-year-old within a day. After posing a threat to the Enterprise-D due to emitting Eichner-radiation, the alien had to abort its experiment and the child subsequently died. |
| Kestra Troi | Andreana Weiner | Dark Page (TNG) | The first daughter of Lwaxana Troi (and therefore older sister of Deanna Troi), who tragically died as a child. Not to be confused with Deanna and William Riker's daughter, who appears in Star Trek: Picard season one. |
| Lwaxana Troi | Majel Barrett | Haven (TNG) recurring thereafter, The Forsaken (DS9) recurring thereafter | Daughter of the Fifth House, Holder of the Sacred Chalice of Rixx, Heir to the Five Holy Rings of Betazed; mother of Deanna and Kestra Troi and wife to Ian Andrew Troi. Constantly on manhunt, she became somewhat of an annoying menace to Captain Picard when she was on board the Enterprise-D, as well as later on to Odo on DS9. |
| T'Rul | Martha Hackett | The Search, Parts I and II (DS9) | Romulan subcommander who was assigned to operate and protect the cloaking device that her government lent to the USS Defiant NX-74205 in 2371. |
| T'Sai | Edna Glover | TMP | Female Vulcan Master who was to have officiated the ceremony recognizing Spock's attainment of the Kolinahr. However, when he stopped her from giving him a symbolic necklace of his achievement, T'Sai mind-melded with him and discovered that he was preoccupied by a "consciousness" calling to him from deep space. She immediately ended the ceremony and pronounced that Spock had not achieved Kolinahr after all. |
| T'Shanik | Tasia Valenza | Coming of Age (TNG) | Female Vulcan who took the Starfleet Academy entrance exam on Relva VII in 2364, along with Wesley Crusher and Oliana Mirren. All three of them lost out to Mordock, who subsequently became the first Benzite in Starfleet. |
| Charles "Trip" Tucker III | Connor Trinneer | Broken Bow (ENT) recurring thereafter | Commander; Chief Engineer and Second Officer, Enterprise NX-01 |
| Tuvix | Tom Wright | Tuvix (VOY) | The hybrid of Tuvok and Neelix, which was the result of a transporter accident. |
| Tuvok | Tim Russ | Caretaker (VOY) recurring thereafter, Through The Looking Glass (DS9), Grounded (LOW), The Last Generation (PIC) | The Vulcan tactical officer and second officer (and briefly acting captain) aboard USS Voyager. Becomes commander by 2381 and captain by 2401, and is subjected to a Changeling impersonation before he is rescued after the events of Frontier Day. Member of the Terran Resistance in the Mirror Universe in DS9. |
| Mark Twain | Jerry Hardin | Time's Arrow (TNG) | The 19th century author, first known as Samuel Clemens, accidentally time traveled when crew members of the Enterprise-D traveled back in time. |
| José Tyler | Peter Duryea | The Cage (TC) | Navigator aboard the Enterprise under Captain Christopher Pike. |

### U

| Character | Actor | Appearances | Description |
| Aquiel Uhnari | Renée Jones | Aquiel (TNG) | Haliian Communications technician at Relay Station 47. Accused of murder, but found innocent. Had a brief romantic relationship with Geordi La Forge |
| Nyota Uhura | Nichelle Nichols Zoe Saldana Celia Rose Gooding | TOS, TAS, TMP, WOK, SFS, TVH, TFF, TUC, ST09, STID, STB, SNW | Chief Communications Officer on board the Enterprise and Enterprise-A. Her given name is revealed in the Star Trek reboot. |
| Kevin Uxbridge | John Anderson | The Survivors (TNG) | The alias used by a "Douwd," a member of a discorporate race of near-omnipotent "immortal beings of disguises and false surroundings" called the Douwds. Repentant for the genocide he committed against another race, known as the Husnock, through psychic powers in blind revenge for the death of Rishon Uxbridge, his human wife. |
| Rishon Uxbridge | Anne Haney | The Survivors (TNG) | The human wife of Kevin Uxbridge, whom the Husnock killed; her Douwd husband Kevin Uxbridge avenged her death by destroying the entire Husnock species in blind revenge over his grief. |

### V

| Character | Actor | Appearances | Description |
| Vadosia | Jack Shearer | The Forsaken (DS9) | Bolian ambassador sent to Deep Space Nine to investigate the Bajoran wormhole in 2369. |
| Vagh | Edward Wiley | The Mind's Eye (TNG) | Klingon governor of Krios in late 2367. He accused Starfleet of supplying weapons to Kriosian rebels, who sought to gain their planet's independence from the Klingon Empire. However, Data and Geordi La Forge discovered that the weapons actually had been constructed and distributed by the Romulans. While Vagh was aboard the Enterprise-D to witness the crew's investigation into the matter, he was nearly killed by La Forge, who had been "conditioned" by the Romulans to shoot him. |
| Valeris | Kim Cattrall | TUC | Starfleet lieutenant and Enterprise-A helmsman who was complicit in the assassination of Klingon chancellor Gorkon. Kim Cattrall chose the Eris element of the character's name, for the Greek goddess of strife, which was Vulcanised by the addition of the "Val" at the behest of director Nicholas Meyer. |
| Valkris | Catherine Shirriff | SFS | An elegant Klingon agent who stole a copy of Admiral Kirk's summary of the Genesis Project. She booked passage on the Merchantman to rendezvous with a Bird-of-Prey commanded by Kruge, to whom she presented the information. When Kruge found out that she had watched the summary herself, he destroyed the Merchantman. Valkris and Kruge may have been lovers, as her final endearment to him was, "Success, my lord, and my love." |
| Varel | Susanna Thompson | The Next Phase (TNG) | Romulan officer aboard Mirok's ship who conspires with him to destroy the Enterprise-D. They decide to send a muon feedback wave along the Enterprise's power transfer beam. The muon particles would collect inside the starship's Dilithium core and explode when the Enterprise engaged warp speed. |
| Varria | Jane Daly | The Most Toys (TNG) | Assistant to Kivas Fajo for 14 years. Helping Data escape from Fajo's ship led to her death. |
| Vash | Jennifer Hetrick | Captain's Holiday (TNG), Qpid (TNG), Q-Less (DS9) | An antiquarian, with a habit of pursuing artifacts with unethical zeal as a profiteer, who falls in love with Picard. She first appeared in the Star Trek: The Next Generation episode "Captain's Holiday", in which Jean-Luc Picard vacationed on Risa. Vash had discovered the Tox Uthat, an artifact thieves were determined to take from her; with Picard's help, the thieves were thwarted. During this adventure, she and Picard fell in love. They met up again in the episode "Qpid", in which Vash became annoyed on finding that none of Picard's senior staff had even heard of her, despite his explanation that he is "a very private man." Q abducted her and the Enterprise senior staff, casting them into a Robin Hood scenario, with Picard playing Robin Hood and Vash as Maid Marian. The result was Vash leaving with Q to the Gamma Quadrant, to scour archaeological sites there. Vash reappeared in the Star Trek: Deep Space Nine episode "Q-Less" two years later, in which episode she mistook for an artifact an "egg", which subsequently hatched as a lifeform at the end of the episode. In 2017, CBR ranked Vash the 11th "fiercest" female character of the Star Trek universe. |
| Tova Veer | Christopher Liam Moore | Distant Origin (VOY) | Assistant to Professor Gegen |
| Vekma | Laura Drake | A Matter of Honor (TNG) | Klingon officer serving aboard the IKS Pagh in 2365. She said that Commander William Riker wasn't very attractive, but that she would "have him". She and Zegov were inquisitive and wanted to know how Riker would "endure" them ... sexually. Before leaving the mess hall, she told Riker that she might be back for him. |
| Velal | Stephen Yoakam | Inter Arma Enim Silent Leges (DS9) recurring thereafter | Romulan subcommander who was to replace Senator Kimara Cretak at a weekly Deep Space Nine meeting while she attended a conference on Romulus in 2375. Shortly afterward, Velal was promoted to general. After all Federation and Romulan ships were rendered powerless by a Breen energy dissipation weapon, Velal was genuinely dismayed to learn that only the Klingons stood between the alliance and total defeat at the hands of the Dominion. Near the end of the war, when the Dominion pulled all its forces back to Cardassian space, Velal's instinct was to merely "contain them within their perimeter" instead of attacking. He changed his mind when Vice Admiral William Ross, Captain Benjamin Sisko and General Martok decide on the latter. |
| Verad | John Glover | Invasive procedures (DS9) | Verad was an unjoined Trill and failed host candidate who briefly stole the Dax symbiont from Jadzia Dax in 2370. |
| V'Ger | None | TMP | A sentient being that evolved from Voyager 6, a fictitious space probe (inspired by the real life Voyager program) from the 20th century that vanished into a black hole and was given life by a race of living machines. The story of V'Ger and its return to Earth to seek "the creator" forms the plot for the first feature film in the Star Trek series, Star Trek: The Motion Picture. V'Ger's story is also expanded upon in the novelization, and various novels, most notably William Shatner's The Return. Some novels, comics, and videogames have strongly implied that V'Ger was the progenitor of the Borg, or was encountered by the Borg culture's direct ancestors. The Gene Roddenberry-authored novelization of the movie consistently named "V'Ger" with the spelling "Vejur" throughout the novelization's text, to preserve the surprise ending. |
| Jason Vigo | Ken Olandt | Bloodlines (TNG) | Bok, a Ferengi, altered Vigo's DNA to make him appear to be the son of Enterprise Captain Jean-Luc Picard. Bok used Vigo as bait as part of a plan to avenge his son's death at the hand of Picard. |
| Miranda Vigo | None (Only discussed, never seen.) | Bloodlines (TNG) | Mother of Jason Vigo, one-time love interest of Jean-Luc Picard. |
| Vina | Susan Oliver Melissa George | The Cage (TC), The Menagerie (TOS) If Memory Serves (DSC) | Sole survivor of Earth science expedition that crashed on planet Talos IV, "repaired" by Talosians and prepared to be "Eve" when a suitable "Adam" could be found. |
| Vixis | Spice Williams | TFF | Klingon first officer aboard Captain Klaa's Bird-of-Prey. She's extremely muscular with severely short hair and a no-nonsense attitude. She speaks English, as she demonstrates when responding to the Enterprise-A's hail and pretending to be Starfleet Command. |
| V'Lar | Fionnula Flanagan | Fallen Hero (ENT) | Vulcan ambassador who negotiated the first territorial accords between Vulcan and Andoria in 2097. She also met a young T'Pol at the Ka'Tann conference. In 2152, she infiltrated the government of Mazar to expose corrupt officials and had to be extracted by Enterprise NX-01. |
| V'Las | Robert Foxworth | The Forge (ENT) recurring thereafter | Vulcan administrator of the Vulcan High Command. Addressed as "excellency." Until he was removed as leader in 2154, he pursued a radical agenda that was contrary to the true teachings of Surak. He militarized the Vulcan fleet and suppressed the practice of mind melds. He was secretly working with a Romulan agent, Talok, to force the reunification of their peoples. When V'Las tried to start a war with the Andorian Imperial Guard, one of his ministers, Kuvak, shot (stunned) him, thus stopping the conflict and disbanding the Vulcan High Command. |
| Volnoth | Marc Lawrence | The Vengeance Factor (TNG) | Volnoth was an Acamarian Gatherer and a member of Clan Lornak. During negotiations with the Gatherer's leader Chorgan in 2366, he was killed by Sovereign Marouk's servant Yuta because of ancient clan rivalries. |
| Vorik | Alexander Enberg | Fair Trade (VOY) recurring thereafter | Starfleet ensign and Vulcan engineer aboard the Starship Voyager. He bears a striking resemblance to Ensign Taurik, another Vulcan engineer who served on the Enterprise-D. |
| Vosk | Jack Gwaltney | Storm Front (ENT) | Alien enemy in Agent Daniels' Temporal Cold War who joins with the Nazis during World War II, enabling them to defeat the Allies. |
| Vreenak | Stephen McHattie | In the Pale Moonlight (DS9) | A key member of the Romulan Senate from 2360 to 2374, Vice-Chairman of the Tal Shiar, secretary of the War Plans Council, and one of Proconsul Neral's most trusted advisors. Ardently pro-Dominion, Vreenak was key in negotiating the non-aggression pact between the Romulan Star Empire and the Dominion in late 2373. However, his death caused the Romulans to join the Dominion War on the side of the Federation-Klingon alliance. |

### W

| Character | Actor | Appearances | Description |
| Barry Waddle | Charlie Brill | Trials and Tribble-ations (DS9) | Alias used by disgraced Klingon spy Arne Darvin to gain passage aboard the USS Defiant |
| Wadi | | Move Along Home(DS9) | Aliens from the Gamma Quadrant who force the cheating Quark to play an 'Honest Game" with four of DS9 Staff as game tokens! |
| Darien Wallace | Guy Vardaman | Too Short a Season (TNG) recurring thereafter, GEN | Lieutenant Darien Wallace was born on Altair IV on stardate 22991.6 as the son of Dennis and Laurel Wallace. He was a Starfleet crew member who served aboard the USS Enterprise-D from 2364 to 2371. Wallace's personal information was displayed on a viewscreen to Counselor Deanna Troi in a psychic phenomenon in Eye of the Beholder. The character appeared in 66 episodes and Star Trek Generations, but was never credited. |
| Tim Watters | Paul Popowich | Valiant (DS9) | Red Squad cadet who commanded the USS Valiant after the death of Captain Ramirez. |
| Robert Wesley | Barry Russo James Doohan (voice) | The Ultimate Computer (TOS), One of Our Planets Is Missing (TAS) | Starfleet commodore commanding both the USS Lexington and a battlegroup of starships, later retired from the service to become governor of the planet Mantilles. |
| West | René Auberjonois | TUC | Starfleet colonel who proposes "Operation Retrieve" to rescue Kirk and McCoy from Qo'noS. Later, during the Khitomer Conference, West disguises himself as a Klingon and attempts to assassinate Chancellor Azetbur and/or the Federation President. Scotty, however, spots "Klingon West" in his sniper's nest and shoots him down. Klingon colonel Worf notices from the would-be assassin's shattered skull that the blood is not Klingon, whereupon West's mask is removed and his true identity revealed. |
| Westervliet | Byron Morrow | For the World Is Hollow and I Have Touched the Sky (TOS) | Starfleet admiral who relieves the Enterprise of any further responsibility regarding the asteroid ship Yonada. He says that Starfleet Command will take care of the problem, while the Enterprise must continue on her mission. |
| Weyoun | Jeffrey Combs | To the Death (DS9) recurring thereafter | Vorta male; cloned at least eight times. Confidant of the Founders, he's eventually the leading Vorta of all Dominion operations in the Alpha Quadrant. |
| Naomi Wildman | Scarlett Pomers (preadolescent, recurring) Emily Leibovitch (baby, uncredited) Brooke Stephens (child) Vanessa Branch (adult) | Deadlock (VOY) recurring thereafter | Half-Ktarian, half-Human female; daughter of Greskrendtregk and Samantha Wildman; born aboard Voyager shortly before the entire ship and crew are duplicated. Dies on one ship, survives on the other. The surviving Naomi, carried by her version of Ensign Kim, crosses to the Naomi-less/Kim-less ship just before “their” version of Voyager is destroyed. She later almost dies while still a relative newborn due to complications of coping with the planet's environment that she and the Voyager crew were stranded on at the time but was saved by the leader of a native tribe using herbs and roots; grew up fast due to her father's genes. In "Shattered", per the title, an adult Naomi from 23 years in the future interacts with crew members from various other time frames. |
| Samantha Wildman | Nancy Hower | Elogium (VOY) recurring thereafter | Ensign, joined Voyager as xenobiologist, not knowing she was pregnant by her Ktarian husband Greskrendtregk; gave birth to Naomi in 2372. |
| Vedek, later Kai Winn Adami | Louise Fletcher | In the Hands of the Prophets (DS9) recurring thereafter | Bajoran female, engineer of a failed plot to assassinate rival Vedek Bareil, later elected "Kai" (spiritual leader of the planet Bajor) |
| Wixiban | James Nardini | Fair Trade (VOY) | Talaxian male; encountered Neelix at the Nekrit Supply Depot. |
| Worf | Michael Dorn | Encounter at Farpoint (TNG) recurring thereafter, The Way of the Warrior (DS9) recurring thereafter, GEN, FCT, INS, NEM, Disengage (PIC) recurring thereafter | The elder of two sons of Mogh; an officer aboard the Enterprise-D before joining space station Deep Space Nine and the starship Defiant; afterward, an aide to Klingon Chancellor Martok and an adopted member of his House. Federation Ambassador to the Klingon homeworld Qo'noS in the late 2370s; later Captain of the Enterprise-E, then subcontractor agent for Starfleet Intelligence by 2401 and meditation teacher by 2402. Husband of K'Ehleyr (mother of his only child Alexander) and later of Jadzia Dax for a year. |
| Colonel Worf | Michael Dorn | TUC | Klingon colonel who, in 2293, acts as defense counsel for Kirk and McCoy during their trial for "assassinating" Chancellor Gorkon. Later, during the Khitomer Conference, after Scotty kills a Klingon sniper, Worf notes that the color of the victim's blood isn't Klingon at all. The would-be assassin is revealed to be Starfleet colonel West. |
| Wrightwell | None (Only discussed, never seen.) | Journey's End (TNG) | Starfleet commander and aide to Admiral Alynna Nechayev. |
| Dr. Wykoff | Casey Biggs | Shadows and Symbols (DS9) | A physician at a psychiatric hospital in a false vision given Benjamin Sisko by the Pah-wraiths |

### Y

| Character | Actor | Appearances | Description |
| Yanar | Rosalind Allen, credited as Rosalind Ingledew (her maiden name) | The Outrageous Okona (TNG) | Only daughter of Chief Representative Debin of the Atlec legation, who was believed to be impregnated by The Outrageous Okona in 2365, whereas the real father was Yanar's love interest Benzan, the son of the ruler of Straleb. |
| Ishara Yar | Beth Toussaint | Legacy (TNG) | Sister of Tasha Yar. |
| Tasha Yar | Denise Crosby | Encounter at Farpoint (TNG) recurring thereafter | Security Chief of the Enterprise-D in 2364 under Captain Jean Luc Picard. In late 2364 she was killed by an alien entity known as Armus on the planet Vagra II while attempting to rescue the crew of a crashed shuttle. In an alternate timeline created with the USS Enterprise-C traveled forward in time, Tasha lived and continued to serve as Picard's security officer on the battleship Enterprise during the Klingon-Federation war. Learning of her fate in the original timeline from Guinan, Tasha opted to travel back in time with the Enterprise-C crew, believing that her death in battle with the Romulans would count for something. However, Tasha survived the attack and was captured by the Romulans and became the concubine to a Romulan officer and later gave birth to a daughter, Sela. Tasha was killed whilst attempting to escape Romulus with her daughter. |
| Kasidy Danielle Yates | Penny Johnson Jerald | Family Business (DS9) recurring thereafter | Captain of the freighter Xhosa who was sent to prison for a year for smuggling for the Maquis. Also the love interest (and eventually wife) of Captain Sisko, she becomes pregnant with his child before the end of the series. |
| Yelgrun | Iggy Pop | The Magnificent Ferengi (DS9) | A Vorta holding Ishka hostage for a prisoner exchange aboard the abandoned Cardassian space station Empok Nor. |
| Yeto | Steve Rankin | Invasive procedures (DS9) | In 2370, the two Klingons Yeto and T'Kar were hired by the Trill Verad, to steal the Dax symbiont from Jadzia Dax. They traveled to Deep Space 9 aboard the Ekina. |
| Youngblood | James G. Becker | Encounter at Farpoint (TNG) recurring thereafter | Ensign Youngblood was a Starfleet officer who served aboard the USS Enterprise-D from 2364 to 2366. He was just a background character, appearing in a total of 40 episodes, but the actor was credited just once (as "Ten Forward Crew" in "The Offsping"). |
| Yuta | Lisa Wilcox | The Vengeance Factor (TNG) | Yuta was a member of the clan Tralesta; she was the last surviving member of that clan, and was one of five Tralestas to survive the clan's decimation by the Lornak clan nearly 100 years prior. In 2366, when Yuta was a servant to Sovereign Marouk, leader of the Acamarians, who was petitioned by Captain Picard for aid in dealing with "the Gatherers", Yuta accompanied Marouk, and tried to murder Chorgan, leader of the Gatherers and the last surviving member of the Lornaks. |
| Yutan | Gary Pillar | A Private Little War (TOS) | One of the Hill People on the planet Neural. Kirk shows him how to fire a flintlock after first teaching Tyree. Later, Tyree orders Yutan to track down two of the Villagers who murdered his wife, Nona. |

### Z

| Character | Actor | Appearances | Description |
| Zahir | David Lee Smith | Darkling (VOY) | Mikhal Traveller who fell in love with Kes |
| Zaldans | Daniel Riordan | Coming of Age (TNG) | Humanoid species characterized by webbed hands. Information about them was included in the Federation database as early as the mid-23rd century. As a culture, Zaldans were easily infuriated by courtesy, as they viewed it as a form of phony social behavior designed to cover true feelings. |
| Zarabeth | Mariette Hartley | All Our Yesterdays (TOS) | Inhabitant of one of Sarpidion's ice ages who briefly became romantically entangled with Spock |
| Zegov | P. Flannery | A Matter of Honor (TNG) | Klingon officer serving aboard the IKS Pagh in 2365. She and Vekma were inquisitive and wanted to know how Commander William Riker would "endure" them ... sexually. Zegov, however, never spoke. She merely eyed Riker from across the crowded mess hall. |
| Grand Nagus Zek | Wallace Shawn | The Nagus (DS9) recurring thereafter | Grand Nagus of the Ferengi Alliance |
| Lewis Zimmerman | Robert Picardo | Projections (VOY) recurring thereafter, Doctor Bashir, I Presume? (DS9) | Developer of the Emergency Medical Hologram. Began to create an LMH (Long-term Medical Hologram) based on Julian Bashir and unwittingly discovered Bashir's genetically-altered nature. |
| Groppler Zorn | Michael Bell | Encounter at Farpoint (TNG) | Leader of the Bandi people |
| Cortin Zweller | Ned Vaughn | Tapestry (TNG) | Jean-Luc Picard's Academy classmate |
| Zobral | Clancy Brown | Desert Crossing (ENT) | Charismatic Torothan leader of the rebellion against the ruling clan on Toroth. Having exhausted all peaceful avenues trying to reform the government, he had turned to terrorism. In 2152, he contacted Enterprise NX-01 in hopes that Captain Jonathan Archer would be willing to help in his cause. After Archer was trapped on Toroth, Zobral risked his life to rescue him, even though Archer refused to help in his revolt. |