Credits
Cast
Bela Lugosi
Dr. Melcher/ Monsieur Colomb
Clayton Moore
FBI Agent Richard ‘Dick’ Martin
Joan Barclay
Alice Saunders
George Pembroke
Dr. William Saunders
Robert Frazer
Amos Hanlin
Robert Fiske
Phillip Wallace
Irving Mitchell
John Van Dyke
Edward Peil Sr.
Ryder
Kenneth Harlan
FBI Chief Colton
Max Hoffman Jr.
Kearney
Joseph Eggenton
Stevens
I. Stanford Jolley
The Dragon
Frank Melton
FBI Agent
Art
Dave Milton
Art Direction
Camera
Arthur Reed
Director of Photography
Directing
Gerald Schnitzer
Assistant Director
Arthur Hammond
Assistant Director
William Nigh
Director
Editing
Carl Pierson
Editor
Production
Sam Katzman
Producer
Jack Dietz
Production Manager, Producer
Sound
Heinz Roemheld
Music
Johnny Lange
Music
Lew Porter
Music
Glen Glenn
Sound Engineer
Writing
Harvey Gates
Screenplay, Original Story
Robert Kehoe
Story