There were countless incarnations of the Time Lord known only as The Doctor.
- The Other
- Original First Doctor
- Original Second Doctor
- Original Third Doctor
- Original Fourth Doctor
- Original Fifth Doctor
- Original Sixth Doctor
- Original Seventh Doctor
- Original Eighth Doctor
- First Doctor - Actually the ninth life lived by the Doctor, but the first of the "new" Doctor created from his predecessor re-looming himself.
- Second Doctor
- Third Doctor - In the original timeline, the Doctor committed suicide and regenerated into a female incarnation. Though her incarnation was erased and the Doctor made a different choice, he still remembered the events in her timeline.
- Third Doctor
- "Fourth" Doctor - Not counted as a regeneration as the Doctor regressed back after one adventure.
- Fourth Doctor
- Fifth Doctor
- Sixth Doctor
- Seventh Doctor
- Eighth Doctor
- War Doctor - Technically the ninth incarnation, but as he renounced his title, he is not numbered among the Doctors.
- Ninth Doctor
- Tenth Doctor
- Eleventh Doctor
- Twelfth Doctor
- Future incarnation - A future incarnation.
- Muldwych - A future incarnation.
- Future incarnation - A future incarnation.
- Future incarnation - A future incarnation.
- "Dr. Smith" - A future incarnation.
- Future incarnation - A future incarnation.
- Future incarnation - A future incarnation.
- Future incarnation - A future incarnation.
- Future incarnation - A future incarnation.
- Future incarnation - A future incarnation. This incarnation met his seventh self at a party.
- Future incarnation - A future incarnation. This incarnation marked the beginning of the Doctor "revisiting old faces".
- Future incarnation - A future incarnation.
- Future incarnation - A twisted future incarnation who believed the ends justified the means.
- Future incarnation - The penultimate incarnation of the Doctor.
- The Valeyard - A splinter incarnation from between the Doctor's penultimate and final incarnations.
- The Curator - The final incarnation of the Doctor.
- Resurrected Doctor - The Doctor in a new body, having been resurrected by the Time Lords.
Alternate universes[]
There also existed versions of the Doctor from alternate universes.
- Alternate First Doctor - This version of the First Doctor left Gallifrey much later than his counterpart in the main universe.
- Alternate Third Doctor - In another universe, the Third Doctor was exiled to 1990s Earth, rather than 1970s Earth.
- Burner Doctor - In another universe, the Doctor killed his brother before fleeing Gallifrey, and later became an assassin.