Continuity mistake: Norman pours poison into the pitcher of iced tea. In the next shot, we see him carrying the pitcher and two full glasses on a tray - but the level of liquid in the pitcher hasn't changed, even though he's supposedly filled the glasses from it. Later, when the pitcher is sitting on Mother's dresser, the pitcher's level is lower, but no one has poured anything from it. (01:00:05)
Psycho IV: The Beginning (1990)
Plot summary
Directed by: Mick Garris
Starring: Henry Thomas, Anthony Perkins, Olivia Hussey, CCH Pounder
Norman Bates (Perkins) once again has been having more mother trouble. This time around he is invited to share memories of mom with a radio talk show host, because Norman fears that he may kill again, this time his beloved wife who is impregnated with his child. The reason why he wants her dead is because Norman feels that he cannot let the Bates' legacy continue with their child.
More mistakes in Psycho IV: The Beginning
Norman: I know that in the cosmic scheme of things, little boys are small, but some days they can be... some days little boys can be giants.
More questions & answers from Psycho IV: The Beginning
Answer: Norman is mentally stable in this film. Connie and Norman fell in love during his institutionalization. After being deemed sane and released, they were married. Norman is afraid to have children because he doesn't want to pass on his psychosis. Connie believes that with proper care, their child won't end up like Norman, and plans to become pregnant.