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