First Doctor
- ^ 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 BBC website list of companions.
[edit] Second Doctor
- ^ Jamie was played by Hamish Wilson in The Mind Robber episodes 2 and 3.
- ^ Jamie leaves the Doctor in The War Games, but later appears in the Sixth Doctor-era story The Two Doctors, again as the Second Doctor's companion.
- ^ a b 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.
- ^ The Brigadier later appears in Battlefield alongside the Seventh Doctor, and The Sarah Jane Adventures story Enemy of the Bane.
[edit] Third Doctor
- ^ Liz also makes a cameo appearance in The Five Doctors.
- ^ Jo also appears in The Sarah Jane Adventures story Death of the Doctor, 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.
[edit] Disputed
The following three characters, all associated with
UNIT during the Third Doctor's exile to Earth, are sometimes considered his companions despite only appearing irregularly during his tenure.
[20][21]
- ^ Not including The Five Doctors, where the Brigadier apppears as the Second Doctor's companion.
- ^ First appears as Corporal alongside the Second Doctor in The Invasion
- ^ Subsequently appears with the Fourth Doctor in Robot, Terror of the Zygons and The Android Invasion
- ^ Also makes a cameo appearance in The Five Doctors.
- ^ Not including The Five Doctors
[edit] Fourth Doctor
- ^ Not including The Five Doctors, where Sarah Jane appears as the Third Doctor's companion.
- ^ Harry also appears in The Android Invasion.
- ^ This first incarnation of K-9 returns in the independent spin-off series K-9, regenerating into a newer form.
- ^ K-9 was voiced by Brierley in season 17, explained as laryngitis within the programme.
- ^ The K-9 prop makes only a cameo appearance in Destiny of the Daleks, and does not appear at all in City of Death.
- ^ 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".
- ^ Not including Destiny of the Daleks, in which the robot prop briefly appeared and had no lines.
- ^ Mary Tamm left the series after season 16, and so Time Lady Romana regenerated into the form of Princess Astra, played by Lalla Ward in The Armageddon Factor, at the start of season 17's Destiny of the Daleks.
- ^ Romana leaves the Doctor in Warriors' Gate, before appearing again as the Fouth Doctor's companion in The Five Doctors (played by Ward).
[edit] Fifth Doctor
- ^ Adric also makes a cameo appearance in Time-Flight.
- ^ a b c d e Also makes a cameo appearance in The Caves of Androzani
- ^ Tegan is left behind by the Doctor at the conclusion of Time-Flight but returns in the next serial Arc of Infinity, set around a year later in her relative time.
- ^ Without explanation, Kamelion is not featured in the five serials between his first and last stories (although he does appear in deleted scenes from The Awakening).
[edit] Sixth Doctor
- ^ The series never establishes how the Doctor meets Mel, who first appears as part of the Doctor's future. Their first meeting is recounted in the Past Doctor Adventures novel Business Unusual.
[edit] Seventh Doctor
- ^ Ace's fate is unknown past Survival as she does not appear in the following story, the 1996 film.
[edit] Eighth Doctor
[edit] Ninth Doctor
[edit] Tenth Doctor
- ^ Lead-in to "The Christmas Invasion"
- ^ Rose departs in "Doomsday", and makes brief cameo appearances in "Partners in Crime", "The Poison Sky" and "Midnight" before returning as a companion in "Turn Left". She also appears in The End of Time.
- ^ Including the 2005 Children in Need scene and the three cameo appearances in series 4.
- ^ 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.
- ^ 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.
- ^ Also appears in "School Reunion" and 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.
- ^ Wilf is introduced in "Voyage of the Damned", and recurs throughout series 4 as Donna's grandfather.
[edit] Eleventh Doctor
- ^ 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".
