| Person | Type | Job | Role(s) |
|---|---|---|---|
 Boris Leven | Crew | Art | Production Design |
 Chuck Keehne | Crew | Costume & Make-Up | Wardrobe Master |
 Curt Siodmak | Crew | Writing | Novel |
Earl Snyder | Crew | Sound | Sound Mixer |
Eddie Dunstedter | Crew | Sound | Original Music Composer, Conductor |
Edward G. Boyle | Crew | Art | Set Decoration |
 Felix E. Feist | Crew | Directing | Director, Screenplay |
Harry Redmond Jr. | Crew | Crew | Special Effects |
 Herbert L. Strock | Crew | Editing | Editor, Production Assistant |
Hugh Brooke | Crew | Writing | Adaptation |
 Joseph F. Biroc | Crew | Camera | Director of Photography |
Ruby Felker | Crew | Costume & Make-Up | Hairstylist |
Terry Miles | Crew | Costume & Make-Up | Makeup Artist |
 Tom Gries | Crew | Production | Producer |
Jack R. Berne | Crew | Directing | Assistant Director |
Mary Chaffee | Crew | Directing | Script Supervisor |
Ben Chapman | Crew | Production | Production Supervisor |
Bill Naylor | Crew | Sound | Sound Effects Editor |
 Charles Sullivan | Cast | Actor | |
 Don Brodie | Cast | Actor | Detective Who Follows Dr. Cory from Hotel (uncredited) |
 Frank McLure | Cast | Actor | Man leaving Fuller's Office (uncredited) |
 Gene Evans | Cast | Actor | Dr. Frank Schratt |
 Harlan Warde | Cast | Actor | Treasury Agent Brooke |
 James Anderson | Cast | Actor | Chief Tuttle |
 John Hamilton | Cast | Actor | Mr. McNish (uncredited) |
 Lew Ayres | Cast | Actor | Dr. Patrick J. Cory |
 Lisa Howard | Cast | Actress | Chloe Donovan |
 Max Wagner | Cast | Actor | Station Agent (uncredited) |
Michael Colgan | Cast | Actor | Tom Donovan |
 Nancy Reagan | Cast | Actress | Janice Cory |
 Paul Hoffmann | Cast | Actor | |
 Peter Adams | Cast | Actor | Mr. Webster |
 Sam Harris | Cast | Actor | Man leaving Fuller's Office (uncredited) |
 Shimen Ruskin | Cast | Actor | Tailor |
Stapleton Kent | Cast | W. J. Higgins (uncredited) | |
 Steve Brodie | Cast | Actor | Herbie Yocum |
 Tom Powers | Cast | Actor | Donovan's Washington Advisor |
 Victor Sutherland | Cast | Actor | Nathaniel Fuller |
Walter Merrill | Cast | Actor | |
William Cottrell | Cast | Dr. Crane (uncredited) | |
Mark Lowell | Cast | ||
Katherine Yorke | Cast | Actress | |
| Person | Type | Job | Role(s) |
