Revealing mistake: When Norman drives Dukes car into the pond, it's obvious no one is in it.
Psycho III (1986)
Plot summary
Directed by: Anthony Perkins
Starring: Anthony Perkins, Diana Scarwid, Jeff Fahey, Roberta Maxwell
Norman Bates (Perkins)is still running the Bates motel, and he has kept the dressed skeleton he calls mother. One of his guests is a young girl (Scarwid) who has left the convent where she lived. To get some help he employs a young man. One day a nosey journalist comes to see him to ask questions about his past.
More mistakes in Psycho III
Norman Bates: Conservative clothes never go out of style.
Trivia: Diana Scarwid ab-libbed the famous opening line, "There is no God!".