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Revealing mistake: As they stand talking in Carmen Sternwood's bedroom a very interesting studio reflection occurs when Lauren Bacall says, "she never remembers anyway". The reflection of her dark lipstick as she says this line can be seen moving on Bogart's right cheek. (00:26:25)

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Revealing mistake: Rosemary crosses 5th Avenue as she goes looking for a bookstore to find more material on witches and a lot of bystanders can be seen staring at the film crew. (01:36:10)

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Revealing mistake: Rosemary waits for Hutch at the Time Life Building and a crowd of bystanders can be seen watching the filming as she stands up when she thinks she sees him walking towards her. (01:10:50)

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Revealing mistake: After meeting Roman, Hutch and Rosemary talk about things as they have coffee in her kitchen. If you look out the window the backdrop has no buildings and the sky is black and white. (01:05:40)

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Revealing mistake: As Rosemary looks at Minnie through her door the peep hole is obviously held up by hand in front of the camera as it is moving around considerably. (00:20:05)

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Revealing mistake: As Chris walks around the attic to see what's making the noise the shadow of the candlestick appears on her face which is not possible as it's the only light source up there. (00:30:15)

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Revealing mistake: When Michael Douglas pulls his car in front of Jonny Boz' house after the initial murder we hear him come to a screeching halt. If you look closely, perfect tire skid marks can be seen in the exact same spot on the road in front of his police car before it comes to a stop. (00:04:15)

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Revealing mistake: When Carol, Dr. Marvin and the others enter the alien spaceship it's obvious by the sound that that they are walking on plywood made to look like metal. (00:37:10)

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Revealing mistake: As the alien's speak to Carol, Dr. Marvin and the others inside their spaceship, they use the exact same footage again of them looking at the video screen as they leave earth even though one minute of movie time has elapsed. (00:39:25)

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Revealing mistake: As Father Merrin speaks to another archaeologist in the beginning of the movie the clock on the wall stops between ticks and he turns around to look at it. It's easy to see that the clock pendulum has been pushed up against the window from behind in order to make it stop. (00:06:45)

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Revealing mistake: As Evelyn Mulwray drives Jake home after his altercation with the farmer look closely at the side window next to Jake. The car appears to be driving down the road but the reflection in the vent window is stationary. (01:13:40)

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Revealing mistake: When Jake returns a second time to talk to Russ Yelburton they go into Hollis Mulwray's office and a lot of the pictures have been taken off the walls. The crew makes a very lame attempt, using spray paint, to make it look as though the paintings have been hanging on a wall for very long time. Earlier in the movie we see these same spots and there is obviously no discoloration on the walls. (00:55:55)

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Revealing mistake: When Jake talks with a boy on a horse at the bottom of the LA River, in the distance you can see a television antenna on top of a house. There were no television antennas in Los Angeles in 1937. (00:39:45)

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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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Revealing mistake: As Marilyn walks out during the outdoor party at the Rainbow Cabins, we see an artificial painted backdrop of Niagara Falls behind her that is nowhere near the actual falls that we saw earlier in the movie. (00:17:20)

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Revealing mistake: During the outdoor party at the Rainbow Cabins Marilyn asks the DJ to play "Kiss" in order to drive her husband George nuts, and after a couple of minutes he comes out and smashes the record. As he walks back to cabin B it's obvious this is a set as there's nothing inside the room except a blank wall. (00:20:15)

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Revealing mistake: The day after their first date Benjamin drives through the pouring rain to pick up Elaine. If you look closely out the side windows of the car you can see that it's produced by a rain machine, it's actually a beautiful day with the sun shining. (01:07:40)

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Revealing mistake: Morgana has smoke coming out of her mouth as she recites "The Charm of Making". If you look closely the smoke is being expelled from a tube next to her left cheek that at times is not even close to her mouth. (02:06:00)

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Revealing mistake: Michael Douglas almost has a head-on collision with a bus as he chases Sharon Stone down the highway. If you look closely as he slams on his brakes, there are many skid marks in that exact same spot in the road from previous takes. (00:41:05)

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Revealing mistake: When Jeanne Tripplehorn meets with Michael Douglas it's obvious by the flat reflection of the studio lights that she's wearing prop glasses. (00:13:45)

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