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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: Several authentic looking prop newspapers have headlines reading that "Operation Sky Hook has been wiped out" and they all have the same mistake, no date on top. (00:26:40)

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Continuity mistake: Dr. Marvin tries out his high frequency ultrasonic gun in front of Maj. Huglin. Before he fires it the device is moving, than in the next shot it's still. (00:47:05)

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Continuity mistake: Dr. Marvin tries out his new improved magnetic interference unit and an alien craft is spotted flying around inside of the Belmont lab above their heads. Before the craft takes a dip down at them they're standing on the right of Dr. Marvin's magnetic device, but when we see them again they're standing on the left of his device. (00:50:20)

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Continuity mistake: As Dr. Marvin tries out his high frequency ultrasonic gun in front of Maj. Huglin they're all staring at it. In the next shot they're looking at the cement block before it's destroyed. (00:47:05)

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Continuity mistake: Dr. Marvin walks in as Carol sleeps in their hotel room and then proceeds to call the aliens on his shortwave radio. By the time he walks out of the room to meet with them by the Chesapeake Bay the items on top of his dresser have moved, without anyone going near them. (00:31:10)

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Continuity mistake: Dr. Marvin tries out the new improved magnetic interference unit and invites Prof. Kanter to be the first one to shoot it. He walks over to Prof. Kanter standing in front of the gun twice between shots. (00:49:30)

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Continuity mistake: As Dr. Marvin tries out his high frequency ultrasonic gun in front of Maj. Huglin the engineer to the right of them turns on the generator. In the next shot the lighting has changed and the the shadow of Dr. Marvin's head appears on the pillar behind him. (00:47:00)

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Continuity mistake: At the Pentagon Carol and Dr. Marvin speak to the generals and one of them holds a pipe in his right hand. In the next shot he's holding the pipe in both hands. (00:46:15)

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Continuity mistake: After they've destroyed the alien craft spotted flying around inside of the Belmont lab, Dr. Marvin and the others decide to pack up and leave. Even though the sound has been edited out, the car and truck are already running with their headlights on before anyone gets into them. (00:51:50)

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Continuity mistake: Carol and Dr. Marvin are locked in the underground bunker at "Operation Sky Hook" as the power goes totally dead. Somehow in total darkness without any power we still hear the sound of the aliens speaking which is strange because if you look at the tape recorder it's not running at all. (00:24:40)

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Continuity mistake: Carol and Dr. Marvin are locked in an underground bunker at "Operation Sky Hook" and the doctor makes a tape recording of himself as the power goes out and the lights start to flicker. He says, "The batteries are failing, the recorder's not running up to speed" but if you look at the tape recorder it never slows down and keeps running at the same speed. (00:25:05)

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Continuity mistake: After leaving The Pentagon, Dr. Marvin and Major Huglin arrive at the doctor's hotel in broad daylight. In the next shot as he walks in on Carol sleeping in their room, it's the middle of the night. (00:30:15)

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