Theory:Timeline - The Doctor

This page lists the various incarnations and other versions of the Doctor in order. This timeline is based upon observations of the Doctor Who universe and the events that occur during each of these stories.

By most accounts, the existence and relative placements of the numbered Doctors are all but undisputed. However, there exist unnumbered Doctors that exist in potential futures, or even in the past prior to the First Doctor. As well as that, several stories are not so clear as to what version of the Doctor featured in their events.

As a Time Lord, the Doctor was initially limited to a regeneration cycle of thirteen lives. However, the Eleventh Doctor was enabled to regenerate further as a result of additional regeneration energy provided by his fellow Time Lords. Noting his uncertainty as to how many times he could now regenerate, the Twelfth Doctor, first incarnation of the new cycle, speculated that he could potentially "keep on regenerating forever."

Timeline

 * See also: The Doctor's age

Before the Original
The Doctor's early life
 * The Timeless Child
 * The earliest known incarnations of the Doctor.
 * First Timeless Child
 * Second Timeless Child
 * Third Timeless Child (Grace Nettle)
 * Fourth Timeless Child (Leo Tang)
 * Fifth Timeless Child
 * Sixth Timeless Child
 * Seventh Timeless Child (Jesse Deyi)


 * The Doctor (The Brain of Morbius).
 * Eight incarnations prior to the First Doctor, at least one of them was Patience's husband. May have been the Other, who may have reincarnated into the First Doctor. The Thirteenth Doctor later recalled these incarnations in order to overload the Matrix, shortly after learning of her previous "Timeless Child" incarnations, suggesting a connection.
 * First "Morbius Doctor" (Christopher Barry)
 * Second "Morbius Doctor" (Robert Banks Stewart)
 * Third "Morbius Doctor" (Christopher Baker)
 * Fourth "Morbius Doctor" (Philip Hinchcliffe)
 * Fifth "Morbius Doctor" (Douglas Camfield)
 * Sixth "Morbius Doctor" (Graeme Harper)
 * Seventh "Morbius Doctor" (Robert Holmes)
 * Eighth "Morbius Doctor" (George Gallaccio)

All Thirteen

 * First Doctor (William Hartnell)
 * By his own word, the "original" Doctor. (TV: The Five Doctors, Twice Upon a Time)
 * In an alternate timeline, he died on Grace Alone. (AUDIO: The First Wave)
 * Alternately: The Doctor (Auld Mortality) (Geoffrey Bayldon), El Jefe


 * Second Doctor (Patrick Troughton)
 * Clone: Second Doctor (clone)
 * Alternately: Previous Doctor (Exile) (Nicholas Briggs), Second Doctor (Inferno Earth)


 * Third Doctor (Jon Pertwee)
 * Alternately: The Doctor (Sympathy for the Devil) (David Warner), Third Doctor (Inferno Earth) (Jack Kine), The Doctor (Exile) (Arabella Weir), The Doctor (Who's Who? Earth) (Jon Pertwee)


 * Fourth Doctor (Tom Baker)
 * Clone: Fourth Doctor (clone)
 * Encountered and merged with the Watcher just prior to his regeneration. (TV: Logopolis)


 * Fifth Doctor (Peter Davison)
 * Clone: Fifth Doctor (Dalek duplicate)
 * Alternately: Lord of the Manor, The Warrior (Colin Baker)


 * Sixth Doctor (Colin Baker)
 * Clone: Sixth Doctor (Dalek duplicate), Sixth Doctor (clone)
 * Alternately: Burner Doctor, Theta Sigma (Forever), Sixth Doctor (The People Made of Smoke) (Dan Starkey)


 * Seventh Doctor (Sylvester McCoy)
 * Briefly became the human John Smith.


 * Eighth Doctor (Paul McGann)
 * Alternately: Eighth Doctor (Grace Holloway's husband), Eighth Doctor (cyborg), Doc Gallifrey, Joe Smith, Tardis Tails, Quiquaequod, Johann Schmidt (Paul McGann), Eighth Doctor (Obverse)


 * War Doctor (John Hurt)
 * The ninth incarnation notably fought in the Last Great Time War while abandoning the title of "doctor". Rejected by his succeeding incarnations before being accepted by the Eleventh Doctor. (TV: The Day of the Doctor)
 * Alternatively: Ninth Doctor (Doctor Who and the Time War)


 * Ninth Doctor (Christopher Eccleston)
 * Alternatively: Ninth Doctor (Scream of the Shalka) (Richard E Grant)
 * Alternatively: Ninth Doctor (The Curse of Fatal Death) (Rowan Atkinson


 * Theory:Timeline - The Doctor (The Curse of Fatal Death)
 * Tenth Doctor (David Tennant)
 * Briefly became the human John Smith.
 * The father of Jenny. (TV: The Doctor's Daughter)
 * Died in Donna's World. (TV: Turn Left)
 * Once regenerated and kept the same face, an act which also produced the Meta-Crisis Tenth Doctor and the DoctorDonna. (TV: The Stolen Earth/Journey's End)


 * Eleventh Doctor (Matt Smith)
 * The last incarnation of the Doctor's original regeneration cycle, it was in this form that the Doctor was originally destined to die permanently, on the planet Trenzalore. (TV: The Name of the Doctor)
 * Duplicate: Eleventh Doctor (Ganger)
 * Traveling back to ancient Gallifrey, assumed the role of the figure known as the Other. (COMIC: The Lost Dimension)
 * Briefly held the identity of John Smith.
 * On the brink of dying of old age, the Doctor's life was saved when Clara Oswald convinced the Time Lords to provide him with additional regeneration energy, granting him a "whole new regeneration cycle" (TV: The Time of the Doctor) with an indeterminate amount of regenerations. (TV: Kill the Moon, Hell Bent, The Doctor Falls)

A new cycle

 * Twelfth Doctor (Peter Capaldi)
 * The product of "regeneration number thirteen." (TV: The Time of the Doctor)
 * Alternately: Twelfth Doctor
 * Duplicate: Twelfth Doctor (Shadow World)


 * Thirteenth Doctor (Jodie Whittaker)
 * A female incarnation.
 * Duplicates: The Herald (Herald of Madness), The Sanity


 * Fourteenth Doctor (Ncuti Gatwa)

The Future

 * 42nd Doctor (PROSE: Beige Planet Mars)


 * The Doctor (Battlefield) (AKA Merlin / Muldwych / Dokien)
 * From the future relative to the Seventh Doctor. He believes he is the last incarnation.


 * The Curator (Tom Baker, Colin Baker)
 * Semi-retired, this incarnation serves as curator of the National Gallery, having retired from his adventurous ways. Revisiting the "old favourite" faces, he appears as an older version of numerous past incarnations. While observed mostly with the appearance of the Fourth Doctor, he has been known to assume the form of the Sixth and Eleventh Doctors as well.

Unplaced

 * The Doctor (Fugitive of the Judoon) (Jo Martin)
 * This incarnation of the Doctor abandons her job working for Gat and goes into hiding on Earth under the Chameleon Arch identity "Ruth Clayton". She is accompanied and protected by her companion, Lee Clayton. (TV: Fugitive of the Judoon)


 * Following an encounter with the Thirteenth Doctor, Ruth Clayton resumes her true identity as the Doctor. Lee Clayton and Gat are both killed during the ordeal, while the Doctor escapes in her TARDIS. (TV: Fugitive of the Judoon)

Unidentified Doctors

 * The Doctor (We are the Daleks!)
 * Familiar with the Daleks.


 * The Doctor (From Eternity)
 * An incarnation who works for the Time Lords.


 * The Doctor (Reunion)
 * After the Sixth Doctor.


 * The Doctor (The Giant's Heart)
 * An associate of the Paternoster Gang, suggesting a post-Time War placement.


 * The Doctor (The Dalek Factor)
 * An incarnation with a similar attire to the First Doctor. Uses the title "Professor".


 * The Doctor (Time, Love and TARDIS)
 * Declined an offer of a replacement TARDIS by a fellow Time Lord.

Future Doctors

 * The Doctor (Party Animals)
 * From the future relative to the Seventh Doctor, this incarnation is based on the Doctor portrayed by Nicholas Briggs in the Audio Visuals fan productions.


 * The Doctor (The Blue Angel)
 * After the Eighth Doctor.

Seven Keys to Doomsday

 * Previous Doctor (Seven Keys to Doomsday) (Nicholas Briggs)
 * The Doctor (Seven Keys to Doomsday) (Trevor Martin)

The Cabinet of Light

 * Previous Doctor (The Cabinet of Light)
 * The Doctor (The Cabinet of Light)

Clive's Doctors

 * The Doctor 1
 * A potential Doctor recorded by Clive Finch, this incarnation is described as a tall, bald black woman wielding a flaming sword. (PROSE: Rose)


 * The Doctor 2
 * A potential Doctor recorded by Clive Finch, this incarnation is described as a young girl or boy in a hi-tech wheelchair with a robot dog at their side. (PROSE: Rose)

"Last Doctors"

 * The Emperor
 * An incarnation of the Doctor from the far future and father of Miranda Dawkins. Was assassinated by rebels on the night of his daughter's birth. (COMIC: Miranda)


 * The Doctor (Alien Bodies)
 * The final incarnation of the Doctor died during the War in Heaven. His corpse became the Relic. (PROSE: Alien Bodies)

The Infinity Doctors

 * The Doctor (The Infinity Doctors)
 * Possible equivalent to the Eighth Doctor.

Full Fathom Five

 * The Doctor (Full Fathom Five) (David Collings)
 * New Doctor (Full Fathom Five) (Ian Brooker)

False Negative

 * The Doctor (False Negative)

More ambiguous

 * The Valeyard
 * A possible future version of the Doctor. (AUDIO: The Carrionite Curse) Primarily an adversary of the Sixth Doctor, the Valeyard is, according to, an amalgamation of the Doctor's darker sides from between his twelfth and final incarnations. (TV: The Ultimate Foe) According to the Valeyard himself, he was created as a result of experiments conducted by the final incarnation of the Doctor as he attempted to break the regeneration cycle's limit of thirteen lives. (AUDIO: Trial of the Valeyard)


 * The Other
 * One of the original founders of Time Lord society.


 * Dr. Who
 * A human time traveller and inventor of TARDIS, this character was adapted from the First Doctor. A potentially unreliable account suggests that Dr. Who is the Other. (PROSE: Human Nature) According to a theory by Peter Cushing, Dr. Who is a future incarnation of the Doctor who was forced to relive his earlier adventures by the Celestial Toymaker.