Robert Wright Campbell's script was rewritten by Charles B. Griffith, who claimed Corman asked him to reuse his screenplay for Atlas (1960), Beast from Haunted Cave (1960) and Creature from the Haunted Sea (1961).
It was shot in two weeks back to back with Naked Paradise, with Corman only taking one day off in between.
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The film was shot in Puerto Rico back-to-back with two other Corman productions, The Last Woman on Earth and Battle of Blood Island, from a script that had previously been filmed as Naked Paradise and Beast from Haunted Cave.
Screenwriter Charles B. Griffith was asked to rewrite a screenplay that had previously been filmed as Naked Paradise and Beast from Haunted Cave for the new locations, to complete the screenplay in three days, and that Corman would be playing one of the characters, Happy Jack Monahan.