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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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Continuity mistake: Carol is tending to the barbecue as Gen. Hanley and Dr. Marvin comes out of the house after their discussion. On the table behind her are two coffee pots stacked on top of each other. In the next shot when they all go to sit down the top one is knocked over. (00:12:10)

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Continuity mistake: Carol is tending to the barbecue as Gen. Hanley and Dr. Marvin comes out of the house after their discussion. On the table behind her are two coffee pots stacked on top of each other. In the next shot when they all go to sit down the top one is knocked over. (00:12:10)

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Continuity mistake: At Operation Sky Hook, Gen. Hanley tries to get Dr. Marvin to stop the launch, but he can't. We see the rocket several times on the doctor's video screen and the rocket that actually blasts of is not the same one we first see, as the tail fans are painted differently. (00:10:20)

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Continuity mistake: Gen. Hanley and another soldier on his left are knocked to the ground as the alien blows up a building behind them. One shot later the alien goes out to bring him back to the ship and now the general is on the opposite side of the soldier. (00:21:20)

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Continuity mistake: Carol talks on the remote TV set to Gen. Hanley and Dr. Marvin in the bunker and we see the rocket behind her with the No. 10 on its fin. The next time we see the rocket as it's being prepared for launch it has the No. 12 on its fin. (00:16:15)

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Continuity mistake: Gen. Hanley is up in the control tower as the UFO flies over the base. In the shots from the control tower there's heavy cloud cover but in the shots outside the control tower it's a clear day. (00:18:00)

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Continuity mistake: The UFO lands at "Operation Sky Hook" and three aliens walk out of it. At first the building on the left is in direct sunlight then in the next shot as we see the dead alien lying there, the building is in the shade. (00:19:30)

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Continuity mistake: At the barbecue, Carol serves Gen. Hanley and Dr. Marvin two very thick hamburgers. In the next shot when they go to sit down to eat, the hamburgers have gotten thinner. (00:12:25)

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Continuity mistake: As Gen. Hanley's car pulls up to "Operation Sky Hook" there are two guards at the post, one is standing by the car and one is moving inside the building. In the next shot as the guard walks into the building to call Dr. Marvin, he's alone. (00:08:40)

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Visible crew/equipment: At "Operation Sky Hook" Dr. Marvin listens back to the tape recording that he was making as the UFO flew over their car and if you look closely the spool of tape on the recorder is at the halfway spot. Earlier as he was making the recording the spool of tape was at the end. (00:05:15 - 00:07:45)

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Continuity mistake: Gen. Hanley drives up to "Operation Sky Hook" and stops in front of the guard post. At first he's in direct sunlight than in the next shot as he hands his ID to the guard, he's in the shade. (00:08:40)

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Visible crew/equipment: Gen. Hanley drives up to "Operation Sky Hook" and the guard says, "No one allowed in, sir. There's a rocket taking off now". You can see the reflection of the cameraman in the side vent window of the car. (00:08:45)

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Continuity mistake: As the Marvin's listen to the tape recording of the UFO, Dr. Marvin stops the recorder and uses his finger to re-wind it. If you look closely he goes way past the spot where the sound started. (00:08:00)

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Continuity mistake: After they pull over to the side of the road to look at the UFO, Dr. Marvin gets back into the drivers side of the car as Carol slides unobstructed from the drivers side over to the passenger seat. In the next shot the tape recorder is sitting there between them. (00:05:55)

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Continuity mistake: Carol and Dr. Marvin finally get to "Operation Sky Hook" and they're driving the exact same make and model car as they were in the previous shot. The only thing that has changed is the license number, which was AV-27-X3 and is now AV-35-B7. (00:06:55)

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Visible crew/equipment: At "Operation Sky Hook" Dr. Marvin says to Carol, "I want you to transcribe these notes for my report" and you can see the shadow of the camera as it follows them on the left of the screen. (00:07:20 - 00:15:50)

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Continuity mistake: After they pull over to the side of the road to look at the UFO Dr. Marvin gets back into the drivers side of the car and his jacket is draped over the center of the front seat. In the next shot it disappears. (00:06:00)

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Continuity mistake: After they pull over to the side of the road and look at the UFO, Dr. Marvin gets back into the drivers seat and hands Carol a Chesterfield from his shirt pocket. In the previous shot he didn't have anything in his shirt pocket, in fact he didn't even have a pocket on his shirt. (00:06:00)

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Continuity mistake: The UFO flies over the Marvin's car as they approach "Operation Sky Hook" and causes them to pull over to the side of the road. When the doctor gets out of the car they're in a different place than they were in the previous shot. (00:05:35)

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