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Other mistake: The first time we see George Loomis back at the Rainbow Cabins after his supposed death he's by the garbage cans in the back of cabin B with a brick wall on the left. The next time we see him two shots later the film has been reversed with the brick wall now being on the right. (00:46:45)

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Continuity mistake: As Jake takes their picture from the roof top we see Katherine Cross and Hollis Mulwray's reflection in the camera lens and her dress is a direct sunlight in the reflection but not in the previous shot. (00:16:05)

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Continuity mistake: Ray Cutler decides to leave the Rainbow Cabins and says to Polly, "Give me a hand with this stuff, will ya, Honey". As he says this he picks up a suitcase which has nothing on top of it, but when we saw it earlier in the scene there were clothes on top of it. (00:49:35)

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Other mistake: The Cutler's now occupy cabin B at the Rainbow Cabins and just before we see George Loomis by the garbage cans in the back of the cabin Polly decides to take a nap. When she gets up from the bed to close the Venetian blinds we see the pillow case and it's white, but two shots later after the blinds are closed she lays down again and the pillow case has a huge dark make up stain on it from several previous takes. (00:46:20)

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Continuity mistake: Marilyn sleeps in her hospital bed as the song "Kiss" plays from the bell tower. At first she's sleeping on her back then in the next shot she's on her side. (00:57:15)

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Continuity mistake: George Loomis chases Polly at the Cave Of The Winds and she almost gets killed braking apart the wooden rail as she runs into it. The part of the railing hanging on the left changes position between shots. (00:54:40)

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Continuity mistake: Marilyn walks up to the ticket booth and gets a refund for one of the tickets to Chicago that she bought earlier in the movie. Looking at her luggage we see no marks on it at all. She picks it up the same way she puts it down, but in the next shot a large black mark appears on the front of it. (01:01:15)

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Factual error: Duffy rows Jake around Echo Park and if you look closely you can see some late twentieth century street lights in the background. (00:14:10)

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Continuity mistake: Hollis Mulwray rows Katherine Cross around Echo Park in a rowboat. When we first see them her hands are in her lap but in the next shot her left hand is touching the side of the boat. (00:15:20)

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Continuity mistake: As Polly Cutler lays out on a beach chair sunning herself Ray steps back and decides to take a picture of her sitting there. Niagara Falls, which are always seen behind them are not in this shot, which has obviously been filmed on a sound stage. The bushes against the stone pillar are also different. (00:34:55)

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Continuity mistake: At the Rainbow Cabins, Mrs. Kettering hands Polly Cutler a bouquet of roses and the pink bow is on the left. In the next shot the bow is rotated 45 degrees to the right and is now facing Mrs. Kettering. (00:44:10)

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Deliberate mistake: Hollis Mulwray walks out to the ocean and it's obviously sunset. In the next shot we see Jake's face up close and it's obviously mid-afternoon. (00:11:05)

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Continuity mistake: Marilyn's lover writes a one line message to her on a postcard and places it back into the postcard rack. She walks over and reads it and we now see that there are 6 lines written on the back of the card. (00:34:05)

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Factual error: Marilyn and the Cutler's follow Inspector Starkey down to the bottom of The Scenic Tunnel Trip to identify George's shoes and when they come up Marilyn hears the song "Kiss" chiming from the bell tower. This is an obvious mistake as the shot of the bell tower that we see here is taken from the American side of the falls and The Scenic Tunnel Trip is on the Canadian side of the falls. (00:39:55)

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Continuity mistake: At the Scenic Tunnel Marilyn's lover writes a message to her on a postcard and places it back into the rack. She walks over and reads it but it isn't in the same place that he put it as the postcard next to it is different. (00:33:55)

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Continuity mistake: Several dark marks appear then disappear and then reappear at different times on the Loomis's front door to cabin B. The marks are there during the party when George Loomis storms out and breaks the record, but then they're not there as Marilyn walks back into the room after speaking to the Cutler's. (00:36:05)

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Continuity mistake: In bed in their room Marilyn says, "Get me some orange juice Georgie" as she lays in bed on her side. In the next shot she's lying on her back. (00:29:30)

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Continuity mistake: In the very first scene of the movie Curly looks at the pictures of his wife that Jake took. He gets to the fourth picture and rotates it 45 degrees to get a better look. As he goes on to the next picture he lifts the fourth one up, and in the next shot he's holding a different picture. (00:02:00)

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Continuity mistake: As Marilyn walks into room 7-A of the City Morgue to identify her husband George she's carrying her pocketbook in her right hand. After she sees the body she faints and falls to the floor but we never hear the pocketbook hit the floor because it has been neatly placed next to her before she fell. (00:42:05)

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Continuity mistake: At the Rainbow Cabins, Polly Cutler lays out on a beach chair sunning herself as Ray comes out to talk to her. There's a second chair about 10 feet to her right but the in the next shot it moves right up next to her. (00:34:40)

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