Jules Bass Director, Producer Boris Karloff Baron Boris von Frankenstein Voice Phyllis Diller The Monster's Mate Voice Allen Swift Felix Flankin, Yetch, Dracula, Invisible Man, Dr. Jekyll, Mr. Hyde, Chef Machiavelli, Captain, First Mate, Mr. Kronkite, Mail Man, The Monster Voice Gale Garnett Francesca Voice Ethel Ennis Title Song Singer Voice Arthur Rankin Jr. Writer, Producer Len Korobkin Screenwriter Harvey Kurtzman Screenwriter Joseph E. Levine Executive Producer Tadahito Mochinaga Cinematographer Kizo Nagashima Assistant Director Maury Laws Original Music