Mickey Mouse

Mickey Mouse was the name of a popular American cartoon character. Captain Jack Harkness nicknamed Mickey Smith, "Mickey Mouse" when they re-encounted each other on the Dalek Crucible. (DW: Journey's End)

Mickey Mouse, as well as his famous girlfriend Minnie Mouse, were alluded to in (NSA: Winner Takes All) when The Doctor, being unimpressed with Disneyland, told Rose he could take her to somewhere with real talking mice.

Behind the scenes

 * In an interview, that can be found as an extra for The Three Doctors DVD, the writers wanted to name K-9 "Pluto" after Mickey's famous pet sidekick, but Disney did not grant permission.