The Doctor (The Brain of Morbius)

An incarnation of the Doctor was the husband of Patience. It was this incarnation who was present at the birth of his granddaughter, Susan Foreman. (PROSE: Cold Fusion, AUDIO: Cold Fusion) One account suggests that this was not an incarnation of the Doctor before his first but an incarnation of the Other, of whom the Doctor was a reincarnation. (PROSE: Lungbarrow)

This incarnation's face was seen in the Fourth Doctor's mindbending battle with Morbius. (TV: The Brain of Morbius)

Behind the scenes
The faces of this Doctor were first introduced in TV: The Brain of Morbius but it was not until AUDIO: Cold Fusion thirty years later, in 2016 that they were confirmed to be incarnations of the Doctor.