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Continuity mistake: As Chris sits in the office waiting for Doctor Klein to come in, the tissue coming out of the Kleenex box behind his desk moves between shots without anyone going near it. (00:34:15)

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Continuity mistake: As Damien walks into the psychiatric ward to visit his mother the woman directly across from her changes sides on her bed between shots. (00:38:15)

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Continuity mistake: We see the alien ship before it destroys the Pacific Paint Company with what looks like a beautiful cloud filled sunset behind it. In the next shot as the building blows up the sky is cloudless. (00:57:30)

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Continuity mistake: After listening to the alien translating device from the helmet the general says, "I'll show you how it works" and Maj. Huglin turns to look at Carol twice between shots. (01:00:40)

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Continuity mistake: In Doctor Klein's office the handle on the ice bucket in the back of the room under the blue picture is moved as the scene progresses and Chris talks to the doctor. (00:33:45 - 00:35:55)

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Continuity mistake: As Prof. Kanter is incinerated by the alien's beam we can see the shadows cast by the leaves of the trees move before our eyes between shots. (00:55:00)

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Continuity mistake: After the general says, "I'll show you how it works" they all turn and follow him. In the next shot they're in an entirely different room. (01:00:55)

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Continuity mistake: The alien helmet that we see on the desk as the generals introduce themselves to Carol and Dr. Marvin is not the same one we saw earlier. This one has a large lip on the bottom and the one that he removed from the dead alien did not. (00:56:20 - 00:59:35)

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Continuity mistake: We see the head of the alien up close twice and each time the gravel underneath is raked differently. (00:56:25)

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Continuity mistake: The alien translating device from the helmet that Dr. Marvin places on the table is not the same one he was just holding. The shade, shape and shadow on the table all change between shots. (00:59:50)

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Continuity mistake: Dr. Marvin and the others stop the car and watch the alien spaceship that shows up landing outside the Belmont lab. At first the car is parked on an angle then in the next close-up shot it's on level ground. (00:52:00)

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Continuity mistake: In their spaceship the aliens use the infinitely indexed memory bank beam to read Gen. Hanley's mind and his hair is combed and his face is dry. In the next shot his hair is messed up and his face is sweaty. (00:24:20)

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Continuity mistake: Prof. Kanter is incinerated by the alien's beam and his cane falls down next to him. The next time we see his smoldering body the cane has been moved and is now touching a tree to the right of the screen. (00:55:05)

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Continuity mistake: As the motorcycle cop gets his brain scanned by the aliens Infinitely Indexed Memory Bank the brain we see is the same one we saw when Gen. Hanley's got his brain scanned earlier in the movie. (00:24:25 - 00:43:10)

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Continuity mistake: As they speak to the aliens inside the spacecraft look closely as the motorcycle cop draws his gun twice before he shoots at the aliens. (00:42:45)

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Continuity mistake: Dr. Marvin says the batteries are dead on the tape recording that he makes, yet several shots later the lights behind Carol and he are back on. (00:25:50)

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Continuity mistake: Carol and Dr. Marvin walked into The Internal Security Commission meeting together. In the next sequence of shots inside the room she disappears, and when Dr. Marvin and Maj. Huglin leave the meeting together she's nowhere to be seen. (00:29:35)

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Continuity mistake: Maj. Huglin walks in as Dr. Marvin works on the high frequency ultrasonic gun and says, "Hello". Another engineer works to right of them and in the next shot he disappears. (00:47:40)

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Continuity mistake: Maj. Huglin walks into the lab as Dr. Marvin works on the high frequency ultrasonic gun and all the equipment behind them is lit up. In the next shot it's not. (00:47:40)

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Continuity mistake: After Chris is startled by the exploding flame in the attic there's a shot of a priest caring flowers into the courtyard of a church and if you look closely the flowers on the right are the same in the close-up but the flowers on the left are not. When he walks into the chapel the flowers are rearranged again. (00:31:20)

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