Sylvester McCoy (Earth-33⅓)

In Earth-33⅓, Sylvester McCoy was one of the actors who portrayed the Doctor in the BBC television series Doctor Who, portraying the Seventh Doctor.

Biography
He was hired by John Nathan-Turner for his uncanny ability to stuff Cyber-ferrets down his pants, playing the Seventh Doctor (COMIC: Doctor Who? 128)

At the start of his tenure in 1987, McCoy told John Nathan-Turner that he wished to play the Seventh Doctor with all the conflicting characteristics of his predeccesors. This caused him to become very indecisive, even when asked to answer a simple question. (COMIC: Ever Wondered What Happened At.. The Auditions For The Seven Doctors?) For the regeneration sequence from the Sixth Doctor to the Seventh, McCoy was asked to get into the Sixth Doctor's costume as the Doctor was meant to lay on the floor of the TARDIS control room. This proved tricky because McCoy was much shorter than his predecessor and his face did not actually poke out of the shirt at all, nor his hands from the sleeves, if he squeezed himself into the outfit. (COMIC: The Regeneration Game)

McCoy was a method actor who took the part of the Doctor very seriously, forcing himself and Ace to ride to location shoots inside the cramped TARDIS prop to "get into character". (COMIC: Time And Relative Dimensions In Sussex)