Plan 9 From Outer Space, 1959

Plan 9 From Outer Space is a 1950s American science fiction horror thriller film; about an alien invasion (by flying saucer/UFO) in San Fernando, California,; the aliens attempt to use zombies to stop the military developing a doomsday weapon; Bela Lugosi's scenes were shot for other abandoned projects and edited into this film posthumously; ineptly made, it's considered by many the worst film of all time; so-bad-it's-good/worst film/camp classic 

Watch full movie below.

Shockadelic rating: Laughable (but ironically enjoyable)

Alternate titles: Grave Robbers From Outer Space; Plan Nine From Outer Space

Contributors: Edward D. Wood, Jr. (Ed Wood), J. Edward Reynolds, Criswell, Gregory Walcott, Mona McKinnon, Tom Keene, Tor Johnson, Dudley Manlove, Joanna Lee, John Breckinridge, Vampira, Bela Lugosi, Frank Worth