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Continuity mistake: The Marvin's pull over to the side of the road to look at the UFO and the upholstery of their car changes from black to white between shots. (00:05:30)

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Continuity mistake: When the Marvin's start necking as they drive to "Operation Sky Hook", the background we see through the rear window shows a curve, but Carol's hands on the steering wheel never move. (00:03:25)

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Continuity mistake: The UFO flies over the Marvin's car as they approach "Operation Sky Hook", and Dr. Marvin tells Carol to pull over. She immediately turns the steering wheel to the left but in the next shot she's steering straight ahead. (00:05:30)

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Deliberate mistake: As the Marvin's approach "Operation Sky Hook" they hear the UFO above. Out the rear view window we can see the same sign and background they passed several minutes ago when the doctor started making his tape recording. (00:05:15)

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Continuity mistake: The aerial shot of Carol and Dr. Marvin driving up to "Operation Sky Hook" shows a flat desert. In the next close-up shot of them inside the car we see a hilly terrain through the rear window. (00:02:40)

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Continuity mistake: The telegraph report says that the UFO they're following is traveling in excess of 2000 mph but when they show the jets speed gauge it's only going 650 mph. (00:00:25)

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Continuity mistake: The UFO flies right over the cockpit of a United Airlines jetliner but does not leave a shadow. (00:00:45)

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Visible crew/equipment: Carol and Dr. Marvin drive by the "Operation Sky Hook" sign and you can see the shadow of the camera on it as they pass. (00:02:50)

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Continuity mistake: Between the second and third shot of the movie the cockpit of the jet changes in the close-up. (00:00:20)

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