The Day Mars Invaded Earth (a.k.a. Spaceraid 63) is a 1963 American independently made 1963 black-and-white CinemaScope science fiction film, produced and directed by Maury Dexter, starring Kent Taylor, Marie Windsor, and William Mims. It was written by Harry Spalding and released by Twentieth Century Fox.

Plot

NASA successfully lands a robotic surveyor on Mars. The rover begins to explore, but after just a few minutes it is completely destroyed by what appears to be a high energy surge. At exactly the same instant back at mission control, Dr. Dave Fielding, in charge of the project, suddenly feels oddly disconnected and not himself; he shakes it off and then goes to face the crowd of expectant reporters. Right after he leaves, his exact body double is sitting at his desk.