همراه (دکتر هو)
یادداشت

↑  Susan travelled with the Doctor prior to the events of An Unearthly Child.
↑  Susan leaves the Doctor in The Dalek Invasion of Earth, later appearing in The Five Doctors as companion to the First Doctor (then played by Richard Hurndall).
↑  The inclusion of Sara Kingdom as a companion varies; e.g. she does not appear on the BBC website list of companions.
↑  Polly and Ben continue travelling with the Doctor following his regeneration in The Tenth Planet.
↑  Jamie is played by Hamish Wilson in parts of The Mind Robber episodes 2 and 3, while Frazer Hines was suffering from chickenpox.
↑  Jamie returns to his own time in The War Games, but later appears in the Sixth Doctor-era story The Two Doctors, again as the Second Doctor's companion.
↑  Also makes a cameo appearance in The Five Doctors.
↑  First appears in The Web of Fear (as Colonel) and The Invasion alongside the Second Doctor, before appearing as a semi-regular character throughout the Third Doctor's era. He further appears in Robot and Terror of the Zygons alongside the Fourth Doctor, and Mawdryn Undead alongside the Fifth Doctor before serving as the Second Doctor's companion in The Five Doctors. He subsequently appears in The Sarah Jane Adventures story Enemy of the Bane.
↑  Liz also makes a cameo appearance in The Five Doctors.
↑  Jo also appears in The Sarah Jane Adventures story Death of the Doctor (2010), alongside Sarah Jane Smith and the Eleventh Doctor.
↑  Sarah continues to travel with the Doctor following his regeneration in Planet of the Spiders, and after her later departure from the series serves as the Third Doctor's companion once more in The Five Doctors.
↑  Lethbridge-Stewart appears alongside the Second Doctor as a colonel in The Web of Fear and subsequently as a brigadier in The Invasion.
↑  Subsequently appears in Robot, Terror of the Zygons, Mawdryn Undead and Battlefield, and as the Second Doctor's companion in The Five Doctors.
↑  Darren Plant portrayed John Benton as a baby in The Time Monster, and Steven Stanley did so as a child in the direct-to-video release, Wartime.
↑  Benton appears alongside the Second Doctor in The Invasion as Corporal Benton.
↑  Subsequently appears with the Fourth Doctor in Robot, Terror of the Zygons and The Android Invasion as WO2 Benton.
↑  Also makes a cameo appearance in The Five Doctors
↑  Harry also appears in The Android Invasion.
↑  The "Mark I" incarnation of K-9, who leaves the Doctor in The Invasion of Time, returns in the independent spin-off series K-9, regenerating into a newer form. A further model of K-9, "Mark III", features in the pilot of K-9 and Company with Sarah Jane Smith, and Doctor Who episode "School Reunion" with the Tenth Doctor and Sarah Jane. Killed and replaced by K-9 Mark IV in the latter episode, he subsequently appears irregularly in The Sarah Jane Adventures, and also the Doctor Who episode "Journey's End".
↑  Romana leaves the Doctor in Warriors' Gate, and subsequently reappears as the Fourth Doctor's companion in The Five Doctors (in footage from Shada).
↑  Adric, Nyssa and Tegan continue travelling with the Doctor following his regeneration in Logopolis.
↑  Nyssa also appears in The Keeper of Traken.
↑  Adric also makes a cameo appearance in Time-Flight.
↑  Also makes a cameo appearance in The Caves of Androzani
↑  Due to problems with the robotic prop, Kamelion was not featured in the five serials between his first and last stories. Planned scenes in The Awakening were cut and never broadcast.
↑  Peri continues travelling with the Doctor following his regeneration in The Caves of Androzani.
↑  The series never establishes how Mel meets the Doctor, who first appears as part of the Doctor's future. Their first meeting is recounted in the Past Doctor Adventures novel Business Unusual and the Big Finish Productions audio-drama The Wrong Doctors.
↑  Mel continues travelling with the Doctor following his regeneration in Time and the Rani.
↑  Ace's fate was unknown past Survival as she does not appear in the following story, the 1996 film. Her post-companionship life was finally revealed in The Sarah Jane Adventures story, Death of the Doctor, in which she is said to have founded a philanthropy, A Charitable Earth (i.e., ACE), and to have raised millions. Sophie Aldred had been contracted by Russell T. Davies to return to the role of Ace in the second half of The Sarah Jane Adventures series 5, before Elisabeth Sladen's death cancelled the series.
↑  Julia Joyce portrays a young Rose in "Father's Day"
↑  Rose continues travelling with the Doctor following his regeneration in "The Parting of the Ways".
↑  Rose departs in "Doomsday", and makes brief cameo appearances in "Partners in Crime", "The Poison Sky" and "Midnight" before returning as a companion from "Turn Left" to "Journey's End". She briefly appears in "The End of Time", and in "The Day of the Doctor" as the interface of the Moment device selects an image of Rose to assist the War Doctor.
↑  Casey Dyer had previously played a young Mickey in "Father's Day".
↑  Mickey is introduced in "Rose" as Rose's boyfriend and recurs regularly before becoming a companion.
↑  Mickey departs in "The Age of Steel" and re-appears in "Army of Ghosts" / "Doomsday" before returning as a companion in "Journey's End". He also appears in "The End of Time".
↑  Introduced in "Doomsday" as "The Bride"
↑  After initially refusing to join the Doctor on his travels in "The Runaway Bride", Donna returns as a regular companion from "Partners in Crime". She also appears in "The End of Time".
↑  Martha departs in "Last of the Time Lords", but returns from "The Sontaran Stratagem" to "The Doctor's Daughter" and again for "The Stolen Earth" / "Journey's End". She also appears in "The End of Time".
↑  Young Jack was portrayed by Jack Montgomery in the spin-off series, Torchwood episode, "Adam".
↑  Jack rejoins the Doctor in "Utopia" before departing in "Last of the Time Lords", but returns again for "The Stolen Earth" / "Journey's End". He also appears in "The End of Time" and later with the Thirteenth Doctor in "Fugitive of the Judoon".
↑  Sarah Jane Smith is portrayed in her infancy, adolescence, and as a teen by, respectively, one or more uncredited babies, Jessica Mogridge, and Jessica Ashworth, in her spin-off series, The Sarah Jane Adventures stories, The Temptation of Sarah Jane Smith, The Day of the Clown, and Whatever Happened to Sarah Jane?.
↑  Previously appears with the Tenth Doctor in "School Reunion".
↑  Also appears in "The End of Time". Additionally, the Doctor appears alongside Sarah Jane in The Sarah Jane Adventures stories The Wedding of Sarah Jane Smith and Death of the Doctor, in his Tenth and Eleventh incarnations respectively.
↑  Rachel Fewell portrays a younger Adelaide in flashback
↑  Wilf is introduced in "Voyage of the Damned" and recurs throughout series 4 as Donna's grandfather. He officially becomes a short-term companion in "The End of Time".
↑  Caitlin Blackwood plays a young Amy (as Amelia) in "The Eleventh Hour", "The Big Bang", "Let's Kill Hitler" and "The God Complex", along with archival footage in "The Angels Take Manhattan"
↑  Amy and Rory are left by the Doctor in "The God Complex", but appear briefly in "Closing Time" and feature as companions again in "The Wedding of River Song". They appear in the final scene of "The Doctor, the Widow and the Wardrobe", before returning as companions from "Asylum of the Daleks".
↑  An illusionary Amy appears to the Doctor before his regeneration in "The Time of the Doctor".
↑  A younger Rory is played by Ezekiel Wigglesworth in "Let's Kill Hitler".
↑  Also appears in "The Eleventh Hour"
↑  Rory is killed in "Cold Blood", but returns in "The Pandorica Opens" as an Auton duplicate before being restored to humanity and resuming his travels with the Doctor and Amy in "The Big Bang".
↑  Earlier incarnations of River Song (as Melody Pond) are played by Sydney Wade in "The Impossible Astronaut" / "Day of the Moon", and Maya Glace-Green and Nina Toussaint-White in "Let's Kill Hitler".
↑  River first appears alongside the Tenth Doctor in "Silence in the Library" / "Forest of the Dead", introduced as a companion from his relative future who calls the Doctor to her aid. Progressively younger versions of River subsequently summon the Eleventh Doctor in "The Time of Angels" / "Flesh and Stone" and "The Pandorica Opens" / "The Big Bang", before the future Doctor summons her to his death in "The Impossible Astronaut".
↑  River refuses the Doctor's offer to travel with her permanently in "Day of the Moon". She subsequently features as a companion in "A Good Man Goes to War", "Let's Kill Hitler" and "The Wedding of River Song", and also appears in "Closing Time". She later appears in "The Angels Take Manhattan" and "The Name of the Doctor".
↑  Also appears in "The Lodger"
↑  Sophie Downham appears as young Clara in the prequel to "The Bells of Saint John", "The Rings of Akhaten" and "The Name of the Doctor".
↑  Coleman first appeared as Oswin Oswald in "Asylum of the Daleks", revealed in "The Name of the Doctor" to be one of multiple echoes of Clara distributed across time. In "The Snowmen", Coleman initially plays another echo of Clara, with her original iteration appearing briefly at the end of the episode. The latter Clara joins the Doctor permanently in "The Bells of Saint John".
↑  Clara continues traveling with the Doctor following his regeneration in "The Time of the Doctor".
↑  Clara dies in "Face the Raven" and appears only as an illusion in "Heaven Sent", before being temporarily rescued from death and appearing as a companion for the final time in "Hell Bent". She subsequently briefly appears in "Twice Upon a Time".
↑  Nardole first appears in "The Husbands of River Song" before appearing as a companion from "The Return of Doctor Mysterio".
↑  Nardole departs in "The Doctor Falls" before briefly reappearing in "Twice Upon a Time".