While John Carradine was busy shooting a day's work on this film, Doris Rich--his wife at the time--was playing Mrs. Santa Claus in the campy Santa Claus Conquers the Martians (1964) (she died in 1980).
Lon Chaney Jr. does not appear in this film, despite his name credited on the video box for "Alien Massacre." His only feature for director David L. Hewitt was Gallery of Horror (1967) (which did co-star John Carradine).
The film takes place in 1975.
Forrest J. Ackerman, the creator and editor of Famous Monsters of Filmland (the most popular fanzine of horror, sci-fi and fantasy film in the Sixties), is the adviser on this film. Ackerman is also credited with coming up with the phrase, " sci-fi ".