List of multi-Doctor stories

A multi-Doctor story is a story featuring two or more different incarnations of the Doctor. There are several different ways a "multi-Doctor story" can be defined; here, stories are sorted according to several different definitions. This list includes stories with flashbacks, but excludes stories featuring only pictures or archive footage of other incarnations.

Note: Some stories fall into multiple categories. For instance, though the War, Ninth, Tenth, Eleventh, Twelfth, and alternate Twelfth Doctors appear in COMIC: Four Doctors, the Tenth, Eleventh, Twelfth, and alternate Twelfth Doctors interact directly; the War Doctor appears only in a flashback separate from the rest; and while the Ninth Doctor is in the same location as his three successors, he does not notice them. For the purposes of this list, Four Doctors is listed three times.

In series 10, The Doctor Falls acted as both a multi-Doctor story with a brief appearance by the First Doctor at the end and a multi-Master story as it featured the of the Master and the  incarnation.

Direct encounters
In these stories, multiple incarnations of the Doctor encounter each other directly, either in person, through a screen, through a phone, through a psychic link, etc. Italicisation means that the relevant Doctor did not directly encounter another Doctor in the story.

Separate narratives
In these stories, multiple incarnations of the Doctor appear in the same story, but at least one does not encounter other incarnation(s) as they are in separate times and/or places. This includes flashbacks and audio/video recordings of a separate incarnation.

Close proximity
In these stories, multiple incarnations of the Doctor are in the same time and place, but do not encounter each other. This includes scenarios where one incarnation sees another incarnation without the latter incarnation's knowledge.

Manifestation
In these stories, multiple incarnations of the Doctor are in the same story, but some are manifestations inside the Doctor's mind, in a dream, created by the Matrix, in a video game, etc.

(Bold denotes the real incarnations in the story.)

Regeneration
In these stories, the Doctor regenerates into their next incarnation.

Retro-regeneration
In these stories, the Doctor temporarily retro-regenerates (i.e. is de-aged) into past incarnation(s).

Same incarnation twice
In these stories, two or more of the same incarnation of the Doctor appear.

Duplicates
In these stories, the Doctor meets a duplicated version of themself.

Lookalikes
In these stories, the Doctor encounters people, who physically resemble them. At least on one occasion, he claimed to unintentionally "chosen the face" of a person whom he met in the past, as "a reminder". (TV: The Girl Who Died)

Imposters
In these stories, the Doctor encounters people, who alter their appearance to look like them or just claim to be another of their incarnations.

Invalid stories
Multi-Doctor stories, of any type, that are not considered valid sources.