Reginald LeBorg Director Basil Rathbone Sir Joel Cadman Actor Akim Tamiroff Odo the Gypsy Actor Bela Lugosi Casimir Actor Lon Chaney Jr. Mungo aka Dr. Monroe Actor John Carradine Borg aka Bohemond Actor Herbert Rudley Dr. Gordon Angus Ramsay Actor Patricia Blair Laurie Monroe Actor Phyllis Stanley Nurse Daphne Actor Tor Johnson Mr. Curry Actor Sally Yarnell Nancy Actor George Sawaya Sailor Actor Claire Carleton Carmona Daly Actor Peter Gordon Sgt. Steele (uncredited) Actor Louanna Gardner Angelina Cadman (uncredited) Actor Clive Morgan Roundsman Blevins (uncredited) Actor John Sheffield Det. Redford (uncredited) Actor Howard W. Koch Producer John C. Higgins Screenwriter Aubrey Schenck Executive Producer Gordon Avil Cinematographer Les Baxter Original Music Clarence Steenson Set Decoration