Roger Corman alumnus Michel Levesque began his brief directorial career with this action/horror hybrid with an elevator pitch title. The cast famously includes folk singer Barry ("Eve Of Destruction") McGuire and former child star Billy Gray from the sci-fi classic The Day The Earth Stood Still. Also with Steve Oliver from Motorpsycho! (1965) as leader of The Devil's Advocates MC. Sadly, the poster art is more entertaining than the film. Levesque fared better with his follow-up, the tropical women-in-prison ballbuster Sweet Sugar (1972) with Phyllis Davis.