Goofs

When Norman fires Toomey and returns to the house, the front parlor light is on in the exterior shot, but when he enters the house, he finds Mary sitting in the dark and turns the light on himself.

There is a vertical window on the side wall of the front entry (to the left as you face the door) which is often clearly seen illuminated in exterior shots. However when interior scenes of the front entry are shown, there are solid walls and no windows on either side of the entry way.

In the scene where the bloody rag is backing up the toilet, Mary grabs all of the towels to clean it up. When she then goes into Norman's mother's room and looks back into the bathroom, there are towels on the rack again.

When Norman is painting the Motel and sees Mother in the window, he drops the paint brush, in the close up his shoes are a black suede color, further shots of him running up the outside steps and interior bedroom shots show his shoes as a beige or camel color.

When Mary stabs Dr. Raymond near the end of the movie, the location of the chest wound slightly changes position between the first and second shot.

There is no way that Norman would have ever been found not guilty by reason of insanity. To use that defense, it would have to be successfully argued that when he committed the murders, he was unable to realize that his actions were morally wrong, but, among many other things, just the fact that he cleaned up after the crimes and lied to the police about them would negate that. Additionally, the fact that he felt guilt about killing his mother (and therefore assumed her identity) would be evidence that even within his psychological disturbance he knows right from wrong.

In Psycho 1 Norman tells Marion when she s checking into Bates motel "There s a big diner 10 miles up the road just outside of Fairdale." When she asks if she s that close to Fairdale Norman replies "15 miles(from the motel)", meaning that it s only 5 miles from the diner to Fairdale, that the diner is closer to Fairdale than it is to Bates motel. In this film Nornan tells Mary the diner is closer to his home and motel than it is to Fairdale.

There is a small table with a telephone at the top of the stairs in the Bates house. However, as seen when the body of Mrs. Bates was being carried down the stairs, and when Detective Arbogast was murdered, these did not appear in the original 1960 film. However, Dr. Raymond did point out to Norman that there had not been a tenant in the house for years, meaning people occupied it in between the 22 years Norman was incarcerated. During that time, these other occupants could have had a phone installed, and had one on that table.

When we first meet Actress Claudia Bryar (Emma Spool) at the diner her hair is naturally her own, yet in the final kitchen scene where Norman confronts her from behind, this is obviously a wig or padded head piece used to soften the blow of the shovel.

Obvious dummy when Norman carries Ms. Spool upstairs.

When Toomey's face is slashed by the killer's knife, the monofilament attached to the make-up effect (intended to rip the prosthetic appliance open just as the knife passes it) can be seen just above his head in the top left area of the frame.

It is revealed that Emma Spool was the murderer, including the murder of the teenage boy in the fruit cellar. However, when he and his girlfriend see a figure dressed as "mother", you can see a shadow moving across the wall with the same hairdo as Lila Loomis, who was not going around killing people.

Mother is depicted standing full-figure directly in front of the second-floor front window. However, the arrangement of the furniture in Mother's room establishes that there is a large desk in front of the forward-facing window, which would prevent a full-figure glimpse of anyone at that window.

When Norman first returns to his house and has a flashback about poisoning his mother, the voice and hand of his mother indicate an elderly woman. But it is suggested in part 1 (and later shown in part 4) that his mother was fairly young and sexually active when Norman poisoned her.

When Norman and Toomey have their face-off in the diner, there is a kid playing a video game in the corner. We hear the sound effects, which are clearly from the game "Pac Man", but when we see the video game it's a cabinet for "Ms. Pac Man", which had completely different sound effects from the original.

When Norman cuts the sandwich for Mary, the sound effect added is the one of a serrated knife scraping the edge of the plate, whereas the blade that we see on the screen is clearly smooth.

When Norman is on the telephone with Mother at the end of the film.

The camera and crew are reflected in the window of the car when Norman arrives home.

When Norman accidentally knocks his suitcase down the stairs, when it reaches the end of the stairs a hand can be seen reaching for the suitcase to stop it rolling past the camera's view.

When Mary and Norman are in the kitchen for the first time and Norman goes to sit, you can see camera movement in the upper glass cabinet.

When Dr. Raymond pulls up to the house and motel.

When Doctor Raymond tells Norman about Lila and Mary harassing him, he asks Norman if he remembers Lila Loomis. Considering that Norman was recently released, and Lila was in the court room mouthing off about her petition and so forth, Norman should indeed remember Lila without a doubt.

With Mary using the last name Samuels instead of Crane, it should have dawned on Norman that this name was similar to the alias that Marion Crane used 22 years prior, particularly since Lila was knowingly in town.

Of everyone that Emma Spool ended up murdering, the body of the teenage boy from the fruit cellar is never discovered.

Reflected in the window of Dr. Raymond's car.

Sheriff John Hunt even though is referred to throughout the film as Sheriff is wearing Captain's Bars on his collar. Captain is a rank that is several levels down from Sheriff. Sheriff is the highest ranking law enforcement official of the county. A Sheriff's Captain would serve under the Sheriff and at the pleasure of the Sheriff.