Director Bill Rebane began shooting the film in 1961, but ran out of money. Years later, director Herschell Gordon Lewis bought the incomplete film to team it with Moonshine Mountain (1964) as a double feature. Lewis filmed some additional footage, added narration (which he did himself), and released it in 1965. Many of the actors didn't come back for later filming, which explains why most of the characters disappear without explanation. One actor changed so much that he ended up playing his own brother.