Revealing: 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.

Visible crew/equipment: In the scene where Eros shows the men the monitor, look at the monitor carefully and you can see the reflection of the studio lights.

Visible crew/equipment: When the pilots are driving the plane and a spaceship pass them you can see a shadow of a microphone.

Continuity: When the men first enter the spaceship, one of the windows shows an afternoon sky and the one next to it shows a nighttime sky.

Continuity: 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.

Revealing: Jeff Trent, Col. Edwards and Lt. Harper grab some guns and take a walk in the graveyard, and a prop tree almost falls over as Col. Edwards walks by and brushes up against it with his shoulder.

Audio problem: In the graveyard, as Paula screams when Tor Johnson opens the car door, her mouth is not moving in sync with what we are hearing.

Revealing: After Tor Johnson drops Paula the police officer comes over to try to wake her. The carpet that's supposed to be the ground crumples under his feet.

Continuity: A man at the old man's funeral says "It's getting dark out." It's already pitch black out.

Other: The exhaust of the space ship is so strong that it knocks down Jeff and Paula to the ground, but their hair doesn't get changed at all.

Plot hole: Eros makes it very clear that his race does not 'cling to life.' If this is the case, then why is he so determined to save everybody?

Audio problem: After Tor Johnson drops her, Paula says, "Oh, I'll be alright" but her lips don't move.

Revealing: Vampira flinches when Inspector Clay fires at her even though she's a zombie.

Deliberate "mistake": At Tor Johnson's funeral how on earth could they not see Vampira standing right next to them?

Continuity: When the stewardess enters the cockpit with her clipboard, she disappears during a closeup on the pilot. It has nothing to do with a different camera angle.

Continuity: During Criswell's opening narration, the time of the story changes from taking place in the future ("Future events such as these will affect you in the future.") to taking place in the past ("what happened on that fateful day...").

Deliberate "mistake": They keep using the same footage of Bela Lugosi walking in the cemetery, even the cars driving by out on the road are the same.

Deliberate "mistake": The saucer flies left to right past a church at the beginning of the movie. Later they just reverse the film as the saucer flies right to left away from the same church.

Continuity: 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.

Continuity: The "Old man-ghoul" changes appearances drastically throughout the entire movie. In some scenes, it is Bela Lugosi in vampire cape, in others it is the famous "double" who is a head taller than Lugosi, a lot thinner and has a different hairstyle. He covers his face with his cape, but this does not help a lot...