Plan 9 From Outer Space (1959) - 86 mistakes

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.

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.

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

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.

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.

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.

Visible crew/equipment: When Colonel Edwards enters the General's office, the moving boom mic is visible at the top of the screen.

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

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.

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?

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.

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

Revealing: When the flying saucers leave the planet, you can see their shadows on the fake planet's surface.

Audio problem: The stewardess comes into the cockpit and the co-pilot says, "Well, I know a friend that will help us". If you look closely, he was going to say more but it was edited out.

Deliberate "mistake": When the pilots are flying in the airplane there's a strange device above the co-pilots head. Later in the movie we see this same prop used again inside of the spaceship as the alien beauty Tanna opens up the hatch.

Continuity: The co-pilot radios in to Burbank tower in the middle of the night. In the next shot we see the saucer and it's broad daylight.