Revealing mistake: When Ratigan is sneaking up on Basil inside Big Ben, there is a shot where both characters have their backs to the camera. In this shot, there is a piece of equipment directly in front of the turning gear they are standing on. This piece of metal can be seen to flicker for a few moments.
The Great Mouse Detective (1986)
1 revealing mistake - chronological order
Directed by: John Musker, Ron Clements, Burny Mattinson, David Michener
Starring: Vincent Price, Barrie Ingham, Val Bettin, Susanne Pollatschek
Continuity mistake: When Professor Ratigan first climbs in his hot air balloon, it is a bright pink. Later, when Basil is chasing him through the sky in his home-made balloon, Ratigan's hot air balloon is a very dark burgundy.
Fidget: I'm going! I'm going! I'm going.
Trivia: Basil of Baker Street is named after Basil Rathbone, the actor who played Sherlock Holmes in several films.