Revealing mistakes: The grass wrinkles and the gravestones flap in the wind and topple over.
Continuity: The white wrought iron patio furniture moves itself from the patio to the bedroom.
Continuity: Day changes to night and back and forth in the same scene, many times.
Continuity: When going to the graveyard, the police car changes to an obviously different police car.
Revealing mistakes: Obvious double for Bela Lugosi.
The aliens obligingly fly by the ABC, CBS, and NBC buildings in Los Angeles.
The police cars and uniforms are authentic: one of the actor's sons was a policeman and supplied the equipment.
Contrary to popular belief, Béla Lugosi did not die during the making of the film. The scene of him in the graveyard is from Edward D. Wood Jr.'s uncompleted "Tomb of the Vampire" project, the other scenes being footage shot outside Tor Johnson's home for a planned TV series. After Lugosi's death, Wood rewrote the "Plan 9" screenplay to incorporate this footage.
Béla Lugosi's part was taken over by Tom Mason (II), Wood's wife's chiropractor, who was significantly taller than Lugosi, and played the part with a cape covering his face.
Wood's original (and preferred) title for his masterpiece was "Grave Robbers from Outer Space."
Internationally recognized as the worst movie ever made.