Isle of the Snake People (1971)

Stars: Boris Karloff, Julissa and Carlos East
Directors: Juan Ibáñez, Jack Hill

Evil scientist runs a veritable army of LSD crazed zombies. The inhabitants of a small, remote island have been practicing voodoo rites and worshipping an evil priest named Damballah for years, but the local law officials generally turn a blind eye to this death cult's bizarre activities.