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