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