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Revealing mistake: When Roman Polanski cuts Jake's nose at the Oak Pass Reservoir, looking closely, his nose is fine and the blood is just on his cheek. (00:42:35)

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Continuity mistake: After leaving Evelyn Mulwray, Jake goes to the Oak Pass Reservoir to look for Hollis Mulwray. If you look at the design on his tie, it's obvious that it has been re-tied. (00:31:30)

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Continuity mistake: As Evelyn Mulwray and Jake talk at the restaurant, look closely at the seat behind him. In the long shots of Jake, both sides are lit up, but, in the close-ups, the left side is in the dark. (00:48:30)

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Continuity mistake: At night, Jake goes back to the Oak Pass Reservoir where Hollis Mulwray was murdered. At first he stands to the left of the no trespassing sign but in the next shot he's on the right of the sign. (00:40:35)

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Continuity mistake: As Evelyn Mulwray stands in front of Jake at the table in the restaurant, look closely at the red chair behind them. When she first walks in, the seam is under the wood post in the center of the screen. In the next shot, it's been moved about two feet to the left. (00:45:50)

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Continuity mistake: When Evelyn Mulwray meets Jake at the restaurant, look closely at the table behind them in the center of the screen. Two men are eating there and the tablecloth and napkin in the man's lap are rearranged between shots. (00:45:45)

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Continuity mistake: When Evelyn Mulwray meets Jake at the restaurant, the maitre d' walks away from them. In the next shot, he's standing looking at them with the waiter by his side. (00:45:45)

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Continuity mistake: When Evelyn Mulwray meets Jake at the restaurant, the spots on her veil change between shots after we first see her. (00:45:45)

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Visible crew/equipment: As Evelyn Mulwray and Jake talk in the restaurant, he holds up an envelope and the shadow of the camera can be seen on its back. (00:49:15)

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Visible crew/equipment: After having tea with Evelyn Mulwray Jake gets up and walks away. The shadow of the cameraman appears on the back of his jacket. (00:30:40)

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Continuity mistake: Jake says to Evelyn Mulwray, "Whoever set your husband up, set me up" and the shadow on the house behind her moves several feet to the left as the scene progresses. (00:28:45)

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Continuity mistake: Jake has tea at Evelyn Mulwray's house and she agrees to drop the charges against him. Evelyn is wearing a scarf that she unties but does not take totally off her neck. In the next shot it's off her neck. (00:28:55)

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Continuity mistake: Jake walks into Hollis Mulwray's office and there's nothing on the green desk mat in front of his secretary. In the next shot her right arm is leaning on an appointment pad. (00:20:45)

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Continuity mistake: Jake opens the middle draw of Hollis Mulwray's desk and then closes it. Several shots later he opens the right draw of the desk and we see that the middle draw is still open. (00:21:10)

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Continuity mistake: Jake walks back into his office after getting a shave at the barber shop and his hair is combed backwards. Later in the scene as he tells the joke about the Chinamen his hair is still parted in the middle but combed sideways to the left and right. (00:18:30)

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Visible crew/equipment: Jake goes into Hollis Mulwray's office and looks at Evelyn Mulwray's picture on his desk. He doesn't move a muscle but the cameraman can be seen moving in the reflection in the glass. (00:20:40)

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Visible crew/equipment: Jake goes to Hollis Mulwray's house and as he rings the doorbell you can see the reflection of the cameraman in the shiny door. (00:25:35)

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Continuity mistake: Jake walks back into his office after getting a shave at the barber shop and sees Duffy standing by the water cooler which has a tank that is one-quarter full. Two shots later as he tells his joke about the Chinamen the water tank is half full. (00:17:50)

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Continuity mistake: The left side of Barney the barber's bowtie is tied differently between shots as he gives Jake a shave. (00:17:10)

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Continuity mistake: George Loomis strangles Marilyn who falls to the floor of in the bell tower holding a yellow scarf near her face. In the next shot it's held away from her body. (01:06:25)

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