Revealing mistake: The woman at the graveyard lets out a scream as she sees the dead bodies. It's obvious that the bodies are dressed up store mannequins. (00:08:40)
Continuity mistake: When we first see Tor Johnson and the other policemen coming out of the police station it's pitch black out. In the next shot of them driving to the cemetery it's broad daylight. (00:08:45)
Continuity mistake: Tor Johnson sits in the front seat of the squad car at the police station. In the next shot of them arriving at the cemetery he's sitting in the backseat. (00:09:20)
Revealing mistake: Often during the film, the trees wobbles a lot when somebody touches them, like fake trees. (00:09:50)
Continuity mistake: When the police are driving to the cemetery, it is daytime and their car is a standard police car with lights and sirens. When they reach the cemetery, it is night and the car is an ordinary car, without lights and sirens, and a different colour. (00:10:05)
Continuity mistake: As Tor Johnson goes into the graveyard with his flashlight we see the same headstones we saw a few moments earlier when the woman screamed, only now they've been rearranged. (00:10:20)
Revealing mistake: Jeff's wife is named Paula and is played Mona McKinnon, but when he is talking to her about having to hush up his UFO sighting, he calls her Mona. (00:12:50)
Visible crew/equipment: A crew member's shadow can be seen moving across the graveyard set as two men carry one of the dead bodies on a stretcher in front of the two policemen. (00:13:20)
Revealing mistake: As the saucer flies over the graveyard, Tor Johnson's shadow can be seen on the studio wall behind him. (00:13:20)
Revealing mistake: When the UFO makes the huge flash that knocks everyone in the cemetery down, one of the police officers kicks a tombstone as he falls and it wobbles back and forth. (00:13:35)
Continuity mistake: Tor Johnson walks to his left past the mausoleum as the ghoul comes out and follows him. He never turns around but two shots later if you look at the head stones, he comes up to the same place again. (00:14:45)
Revealing mistake: Vampira flinches when Inspector Clay fires at her even though she's a zombie. (00:15:05)
Deliberate mistake: At Tor Johnson's funeral how on earth could they not see Vampira standing right next to them? (00:17:00)
Continuity mistake: When the flying saucers are flying over Hollywood, it's nighttime in some scenes and daylight in others. (00:17:45)
Continuity mistake: When the flying saucers are spotted over Wash DC, the scene shows a rotating radar antenna. First it's rotating counter-clockwise, then in a subsequent scene it's rotating clockwise. (00:17:45)
Revealing mistake: When the flying saucers are passing over Hollywood and Washington D.C., there's some shots where you can see their shadows on the fake sky. (00:18:15)
Factual error: When the military are going to attack the flying saucers in Washington D.C., there's some shots where you can see trucks and airplanes in a deserted region. Washington is hundreds of kilometers away from the desert. (00:18:30 - 00:21:10)
Revealing mistake: When the army is firing at the flying saucers, it's obvious that the sky behind the colonel is made of fabric. (00:18:50)
Visible crew/equipment: Col. Tom Edwards makes "The greatest decision of his career" in front of a clear sky, and you can see his shadow fall on the fabric covered wall behind him. (00:18:50)
Revealing mistake: When the people in the military are firing the rockets at the UFOs, you can see the rockets launching from platform are coming from the outside of the platform. (00:19:00)
