Other mistake: Freud didn't go home to get Holmes's dog as instructed and went ahead of Holmes in the investigation; however, in the rest of the movie, he does have Watson's revolver, which would have also been at home.
The Seven Percent Solution (1976)
21 mistakes - chronological order
Directed by: Herbert Ross
Starring: Robert Duvall, Alan Arkin, Vanessa Redgrave, Nicol Williamson
Sherlock Holmes: No, Watson! The Queen wouldn't like it.