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