Sylvester McCoy (in-universe)

Sylvester McCoy was an actor who portrayed "Doctor Who" in a television programme of the same name, and was considered by the Twelfth Doctor to be one of the greatest actors on Earth. He was brought together, along with many other actors to portray "Doctor Who", for a special breakfast in "London's glittering West End". The Twelfth Doctor considered making an appearance, to "see what these fictions [were] like." (WC: Peter Capaldi and Simon the Shy Cyberman Invite You to Breakfast with 7 Doctors)

In 1993, he and his fellow living Doctor actors got into an argument over the size of Tom Baker's "part" in The Dark Dimension, which ultimately led to its cancellation. (COMIC: Doctor Whoah! 379)

In October 2007, he dressed up as the Fifth Doctor in an attempt to infiltrate the rehearsals for that years Children in Need special. (COMIC: Doctor Whoah! 388)