S3, E1: First half of a feature-length / two-part story. Tough Detectives Starsky and Hutch are assigned to go undercover on the luxurious, tropical Playboy Island to investigate the mysterious happenings connected to William Thorne, "the richest man in the world", who lives a reclusive life on the island, and who's associates are being murdered with what appears to be voodoo magic...