Second Doctor

The second incarnation of the Doctor was an exile from Gallifrey, sent by his brother Irving Braxiatel to Earth having just undergone a regeneration. This incarnation of the Doctor is the first one to be the main Doctor in a story from the main body of literature (that is to say, not the Prologue).

The Doctor travels with a Korina woman, Emily Whitaker, who he met on Earth, when both were pretending to be locals.