William Cameron Menzies
Director
Roy Hamilton
Story
George Bricker
Screenplay
Frank L. Moss
Screenplay
Lewis J. Rachmil
Producer
Paul Sawtell
Original Music Composer
Nicholas Musuraca
Director of Photography
Robert Golden
Editor
Carla Balenda
Janet Keller
Elliott Reid
Matt Corbin
Edgar Barrier
Dr. Edward Keller
Raymond Burr
Steve Loomis
Otto Waldis
Dr. Wilhelm Bucholtz
Michael Steele
Chick
Lurene Tuttle
Molly Loomis
Peter Brocco
Nate Garr
Lewis Martin
Peterson
Frank Darien
Luther Adams
Olive Carey
Mabel Turner
George Barrows
Federal Agent (uncredited)
Stanley Blystone
Guard on Pier (uncredited)
Eddie Borden
Medical Experiment Patient (uncredited)
George Bruggeman
Federal Agent (uncredited)
William Challee
Guard (uncredited)
George Chandler
Jed (uncredited)
G. Pat Collins
Nelson - Gate Guard (uncredited)
Tom Daly
Germ Experiment Victim (uncredited)
Don Dillaway
FBI Agent McIntyre (uncredited)
Art Dupuis
Speedboat Pilot (uncredited)
Douglas Evans
Carstairs (uncredited)
Elizabeth Flournoy
Secretary (uncredited)
Robert Foulk
Guard (uncredited)
Gregory Gaye
Sweitart (uncredited)
Milton Kibbee
Produce Company Proprietor (uncredited)
Mathew McCue
Medical Experiment Patient (uncredited)
Lee Miller
Federal Agent (uncredited)
Billy Nelson
Ed (uncredited)
Jamesson Shade
Sheriff (uncredited)
Brick Sullivan
Federal Agent (uncredited)
Bob Thom
Federal Agent (uncredited)
Frank Wilcox
Bradford (uncredited)
William Yetter Sr.
German Pier Guard (uncredited)
