Elenco
Lugosi Béla
Dr. Alex Zorka
Dorothy Arnold
Jean Drew
Robert Kent
Capt. Bob West
Edwin Stanley
Dr. Fred Mallory
Regis Toomey
Lt. Jim Daley
Jack C. Smith
Monk
Edward Van Sloan
Jarvis
Dora Clement
Ann Zorka
Anthony Averill
Rankin
Hugh Huntley
Perkins
Monte Vandergrift
Jarvis Goon
Frank Mayo
West's Boss
Jim Farley
Harbormaster
Eddie Acuff
Mac
Ed Wolff
The Robot
Roy Barcroft
Parker (uncredited)
Lee J. Cobb
Road Crew Foreman (uncredited)
Charles King
Car-Crash Cop (uncredited)
Equipe
Ford Beebe
Director
Saul A. Goodkind
Director
George H. Plympton
Screenplay
Henry MacRae
Associate Producer
Irving Birnbaum
Editor
Basil Dickey
Screenplay
Mildred Barish
Screenplay
Alvin Todd
Editor
William A. Sickner
Director of Photography
Ralph M. DeLacy
Art Direction
Jerome Ash
Director of Photography
Joseph Gluck
Editor
Wyllis Cooper
Original Story