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Continuity mistake: After Mr. Palmer walks over and tries to pick up Claude Mulvihill's gun (which Jack kicks away) we see Jack's hat on his left. In the next shot as Jake picks it up it's now on his right. (01:19:40)

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Continuity mistake: On Jeanne Tripplehorn's desk, there's a large spherical polished rock that has been moved around between shots as Michael Douglas has his first interview with her. (00:14:00)

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Continuity mistake: At 1972 Canyon Drive, Jake sits down and says to Evelyn Mulwray, "Do you know any good criminal lawyers?". If you look closely the dress on the chair to his left has been rearranged between shots. (01:48:45)

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Continuity mistake: Chris talks to Regan as she puts her to bed. If you look closely the large pictures on her night table change position throughout the scene. (00:23:45)

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Continuity mistake: Chris and Regan walk back to Sharon's desk and the radio on the shelf to the right of the desk has moved between shots. (00:17:20)

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Continuity mistake: Father Karras bandages his mother's leg and we see her right hand as she raises it and he says, "Mama, I could take you somewhere…". In the next shot she raises her hand to her head and she now has a band-aid on her wrist. (00:20:50)

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Continuity mistake: There's no smoke inside of the alien spaceship but if you look closely before the motorcycle cop fires his gun, smoke from a previous take can be seen swirling above their heads. (00:42:30)

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Continuity mistake: The alien's show a Navy Destroyer being destroyed by their death rays. Later as it explodes we see the remains of an aircraft carrier. (00:40:40)

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Continuity mistake: Father Karras eats dinner in his mother's apartment and the curtain on the far side of the table moves without being touched the second time we see it. (00:20:25)

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Continuity mistake: Before Father Karras walks into his mother's apartment the lights are on. In the next shot as he walks in the lights are off and he turns them on. (00:19:10)

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Continuity mistake: The alien's speak to Carol, Dr. Marvin and the others and show them a Navy Destroyer on their video screen firing on an alien spaceship. If you look closely the guns on the ship are not aimed at the alien spaceship. (00:40:35)

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Continuity mistake: In the scene in their basement Chris brings the Ouija board over to the ping pong table and Regan puts the paddle down with the ball underneath. In the next shot the paddle is there but the ball disappears. (00:22:45)

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Continuity mistake: As Father Karras goes to New York to see his mother a woman in yellow on the sidewalk with her two children disappear between shots as he crosses the street. (00:18:30)

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Continuity mistake: As Chris and Regan discuss how to play the Ouija board the pointer is to the right of the word No. In the next shot when Regan picks it up it's covering the word No. (00:23:10)

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Continuity mistake: The motorcycle cop looks up at the alien's Infinitely Indexed Memory Bank and the front of his hair is combed up into a pompadour. In the previous shot it was combed down. (00:43:00)

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Continuity mistake: In the scene in their basement Chris takes the painted bird from Regan who touches the wood post in the center of the room with her right hand. In the next shot she's leaning against it. (00:22:15)

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Continuity mistake: The alien spaceship's shadow falls on the sand underneath where Carol, Dr. Marvin and the others are looking at it on the bank of the Chesapeake Bay. In the next shot as they all walk into it they're in sunlight. (00:37:00)

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Continuity mistake: Carol's hair is parted in the middle as they stand and look at the alien spaceship as it sits on the bank of the Chesapeake Bay. When we see her inside the spaceship her hair is parted on the right. (00:37:00)

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Continuity mistake: The Motorcycle cop that is taken up into the alien spaceship with them asks, "What team has won the most World Series?". When he asks the question he takes his hat off which leaves a dark impression on his forehead, in the next shot it's gone. (00:41:40)

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Continuity mistake: As the alien's speak to them inside their spaceship, Dr. Marvin stands next to Carol. In the next shot from behind he has his arm around her waist. (00:40:15)

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