Theory:Timeline - The Master's incarnations

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

The short story Girl Power! offers a definitive number of the Master's incarnations up to and including Missy: "Born, Died, Died, Died, Died, Died, Died, Died, Died, Died, Died, Died, Died, Died, Took over some bloke's body, Died, Died, Died, Became a human, Stopped being a human, Died, Died, Became a woman, Ruled!"

- Missy (PROSE: Girl Power!)

Only instances where the Master has "died" count as regenerations, and not instances the instances of body snatching or undergoing chameleon arch identities.

First eighteen
to be added Briefly became the human Professor Yana. (TV: Utopia)
 * (Derek Jacobi)

Briefly died and later resurrected. (TV: Last of the Time Lords, The End of Time) Presumed to have regenerated into Missy. (TV: The Doctor Falls)
 * (John Simm)

Nineteenth and beyond
First known female incarnation. Explicitly identified as the Master's nineteenth incarnation. (PROSE: Girl Power!)
 * "Missy" (Michelle Gomez)

Would logically be the Master's twentieth incarnation. (PROSE: Girl Power!)
 * "The Lumiat" (Gina McKee)

Would logically be the Master's twenty-first incarnation. (PROSE: Girl Power!)
 * (Sacha Dhawan)