Elenco
Basil Rathbone
Sir Joel Cadman
Herbert Rudley
Dr. Gordon Ramsay
Patricia Blair
Laurie Munroe
Akim Tamiroff
Odo the Gypsy
Phyllis Stanley
Daphne
Lon Chaney Jr.
Dr. Munroe, aka Mungo
Lugosi Béla
Casimir
John Carradine
Bohemund
George Sawaya
Sailor-Subject
Tor Johnson
Mr. Curry
Sally Yarnell
Female Subject
Peter Gordon
Sgt. Steele
Claire Carleton
Carmona Daly
Clive Morgan
Roundsman Blevins (uncredited)
Louanna Gardner
Angelina Cadman
Aubrey Schenck
Prison Coroner's Clerk (uncredited)
John Sheffield
Det. Redford (uncredited)
Equipe
Howard W. Koch
Producer
Reginald Le Borg
Director
John C. Higgins
Screenplay
Les Baxter
Original Music Composer
Aubrey Schenck
Executive Producer
Ted Coodley
Makeup Artist
John F. Schreyer
Editor
Gordon Avil
Director of Photography
Clarence Steensen
Set Decoration
Gerald Drayson Adams
Story
Cherie Banks
Hairstylist
Jack Rabin
Visual Effects
George Bau
Makeup Designer
Louis DeWitt
Visual Effects