The Doctor (The Web of Caves)

A unknown incarnation of "the Doctor" once landed on a planet where one of the inhabitants arranged with him beforehand exactly when and how he would attempt to take over the planet. (TV: )

Personality
This version of the Doctor was calm, and aimed himself to have an unbeknownst outlook at fools. (TV: )

Clothes
He wore a formal coat with a patterned waistcoat, a fob watch, cream trousers and had curly hair. (TV: The Web of Caves)

Behind the scenes

 * Mark Gatiss also portrayed an incarnation of the Master who appears in the Doctor Who Unbound story Sympathy for the Devil (although credited as "Sam Kisgart"), and filled Jon Pertwee's shoes as the Third Doctor in the webcast Another Doctor.