Paul Birch walked off the film before shooting was completed after having a physical confrontation with Roger Corman. As a result, Birch's remaining scenes were shot with Lyle Latell doubling for Birch.
Allied Artists Pictures released this film on a double bill with Attack of the Crab Monsters with the tag line "Terrorama! Double Horror Sensation!"
Joe Piper was written as a brush salesman in an earlier draft of the script. Moreover, Dick Miller ad-libbed all his dialogue as Piper and came up with the idea to make Piper a vacuum cleaner salesman.