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)
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)
Continuity mistake: At The Pentagon Internal Security Commission meeting a General asks, "Does anyone one want to have the recording played again?" and the two military officers standing in the back move to the left between shots, only to return several shots later. (00:27:45)
Continuity mistake: Dr. Marvin runs out of their hotel room and proceeds to his meeting with the aliens by the Chesapeake Bay. Carol calls Major Huglin in his room and we see that the filmmakers used the same room for both shots with items such as paintings, beds, lamps and water pitchers moved to different spots. (00:33:10)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
