Bela Lugosi
Dr. Feodor Orloff / Prof. John Dearborn
Cast (13)
Hugh Williams
Det. Insp. Larry Holt
Greta Gynt
Diana Stuart
Edmon Ryan
Lieutenant Patrick O'Reilly
Wilfred Walter
Blind Jake
Arthur E. Owen
Dumb Lou
Alexander Field
Fred Grogan
Gerald Pring
Henry Stuart
O.B. Clarence
Prof. John Dearborn (voice)
May Hallatt
Police Constable Griggs
Bryan Herbert
Police Sgt. Walsh
Charles Penrose
Morrison, undercover detective
Julie Suedo
Orloff's Secretary
Crew (16)
Walter Summers
Screenplay
John Argyle
Producer
Patrick Kirwan
Screenplay
John Argyle
Screenplay
Walter Summers
Director
Edgar Wallace
Novel
Guy Jones
Original Music Composer
Bryan Langley
Director of Photography
Jan Van Lusil
Additional Dialogue
Hamilton G. Inglis
Production Manager
Harry Benson
Sound Supervisor
A.E. Rudolph
Sound Recordist
Ted Richards
Editor
Duncan Sutherland
Art Direction
Jack Martin
Assistant Director
Ronald Anscombe
Camera Operator