Corrected entry: When Norman shows Marion to room number one he opens the door with the room key. After putting her coat and suitcase on the bed, he puts the room key in his jacket pocket. After showing her the room and inviting her to dinner, Norman turns and pulls the key out of the door and hands it to Marion. He never took the key out of his jacket pocket. And he didn't get both keys from the hook in the office, just one.
Corrected entry: When Martin Balsam questions Anthony Perkins, Perkins says that during her stay at the motel, Janet Leigh didn't make any phone calls. "Did you sleep with her?" Balsam asks. Perkins says no. "Then how do you know she didn't make any phone calls?" This would have been verifiable on the switchboard, where a record would have been kept, especially in the case of a motel, where guests' phone calls are bound to be long distance.
Corrected entry: Something's not right about the money ratio in this film. The guy gives $40,000 to buy a house, which I assume in 1960 was a great deal of money and could have bought a substantial sized property. Yet when Janet Leigh trades her car in, she has to pay a difference of $700. Thats an awful big difference between two second hand cars bearing in mind the cars are quite similar and you can buy a great big house for $40,000.
Corrected entry: The film starts on a Friday. Marion, instead of putting the $40,000 in the bank, packs her bags, including the money, and drives away. She swaps her car for another one at a car yard. That night she sleeps in the car. So it is now Saturday. That night she plans to sleep at a motel, but is killed instead. So now it is Sunday. But the word is out that she stole the money, which they wouldn't have known until another day later, Monday, and after checking her room, and then checking the bank. Everything is preempted, by a full day. And no-one thinks that maybe she was murdered for the money; that she fought her robber/murderer, and is buried in the woods, weighed down and sunk in water. She's a good person, they all say that, but they all believe instantly that she stole the money.
Corrected entry: The state trooper asks Marian for her "license," but not the registration. Then he looks at the car's plate and verifies the number. But it would be on the registration, not on her license. (00:15:50)
Corrected entry: Norman Bates spies on Marion by removing a picture from a wall in his back office but this cannot be so. If you look at the motel from the outside, Marion's cabin is to the right hand side of the office. As you walk into the office the front desk is on the left (as you can tell when the private investigator arrives) and the back office where Bates has his stuffed birds, etc. is behind the front desk. If he looked through a hole in his back office he would have been looking through an outside wall and not into Marion's cabin, which would be on the other side of the office.
Corrected entry: Janet Leigh is driving from Phoenix, AZ to Bakersfield, CA. On the way there is an interview with a state trooper followed by a shot of a sign on the highway saying, "left lane for Gorman". Gorman, CA is in the general vicinity, but it is not on the route one would take to get from Phoenix to Bakersfield.
Corrected entry: Mother comes out of her room and slashes Arbogast with a knife. After he falls down the stairs, Mother comes down and stabs him again. But when she does this, her knife has no blood on it.
Corrected entry: The towel Norman takes off the wall to dry the tub with is white, when he puts it on the back of the toilet it is dark in color and when he throws it into the bucket it is white again.
Corrected entry: The sound of Sam running down the stairs to get to the basement should have been heard, as the stairs are old and he is going quickly, but instead he just pops out and stops Norman from getting to Lila. He probably was just standing nearby.
Corrected entry: In the very brief time between Arbogast's re-arrival at the motel and his murder, Norman manages to disappear behind the motel, reach an upstairs bedroom in the house, and change into "Mother" by the time Arbogast reaches the top of the stairs. Not only that, he does this without Arbogast seeing him, even though it's been established that the house is visible from the office.
Corrected entry: At the end of the movie, Sam is knocked unconscious by Norman. In the next minute or so, he manages to regain consciousness, run all the way to the house, and get to Lila and Mother in the basement. How is that possible?
Corrected entry: Before the famous shower scene, the woman removes her gown, and leaves it by the toilet. Once stabbed, she falls out of the shower (next to the toilet), and it has changed position. The gown then disappears when Norman is mopping the blood off the side of the bathtub and floor.
Corrected entry: After being stabbed in the shower, Marion's hair is flatly pressed down on her head. Later, when you see her lying dead, her hair is more curly.
Corrected entry: Norman Bates invites Marion to have dinner with him as he was going to eat anyway. She accepts and he brings down sandwiches. She then says she's not got any appetite, and he said they are all for her anyway as he's not hungry. Odd really, why would he make dinner for himself if he didn't want to eat and why would she accept dinner if she doesn't want to eat either?