Spragg, an outcast of his race, is forced to the surface of the Earth in Transylvania, where he enslaves the local villagers and forces them to build him a device to boost his powers. A visiting scientist figures out how to rid the planet of Spragg, and flings him into space.; An escaped convict looks to buy a house that has the reputation of being haunted so people will steer clear of him, but when he meets up with a real estate agent turns out to be the ghost that haunts the prospective property, he turns himself in to the police for his own protection.; A dishonest carnival owner hires an amnesiac to play a Martian and cheats him on his wages. When the man regains his memory, he realizes that he really is a Martian, sent to Earth to capture a human for the zoo, and so he takes the crook with him.