| Person | Type | Job | Role(s) |
|---|---|---|---|
 Ernest Haller | Crew | Camera | Director of Photography |
 Francis J. Scheid | Crew | Sound | Sound |
 Friedrich Hollaender | Crew | Sound | Original Music Composer |
 Hal B. Wallis | Crew | Production | Executive Producer |
Howard Shoup | Crew | Costume & Make-Up | Costume Design |
Jeffrey Dell | Crew | Writing | Theatre Play |
John Wexley | Crew | Writing | Screenplay |
 Ladislas Fodor | Crew | Writing | Theatre Play |
 Leo F. Forbstein | Crew | Sound | Music Director |
Lester Cole | Crew | Writing | Screenplay |
 Lloyd Bacon | Crew | Directing | Director |
Max Parker | Crew | Art | Art Direction |
Owen Marks | Crew | Editing | Editor |
Perc Westmore | Crew | Costume & Make-Up | Makeup Artist |
Rex Wimpy | Crew | Crew | Special Effects |
Robert Lord | Crew | Production | Associate Producer |
Bernard Merivale | Crew | Writing | Theatre Play |
 Alan Hale | Cast | Actor | Police Insp. Charles M. Mason |
 Allen Jenkins | Cast | Actor | Wilfred |
 Brenda Marshall | Cast | Actress | Rita Warren |
 Creighton Hale | Cast | Actor | Mr. Harlan (uncredited) |
 David Newell | Cast | Actor | June's Escort (uncredited) |
 Errol Flynn | Cast | Actor | Francis Monroe Warren II, alias F.X. Pettijohn |
 Frank Faylen | Cast | Actor | Gus a Taxi Driver (uncredited) |
 Frank Mayo | Cast | Actor | Joe a Cop (uncredited) |
 Grant Mitchell | Cast | Actor | Wellington Carruthers |
 Jack La Rue | Cast | Actor | Ace Vernon |
 Jack Mower | Cast | Actor | Police Sgt. Brent (uncredited) |
 Lee Patrick | Cast | Actress | Blondie White |
 Lucile Watson | Cast | Actress | Agatha Archer |
 Maris Wrixon | Cast | Actress | June Brewster |
 Noel Madison | Cast | Actor | Leopold Fissue |
 Olaf Hytten | Cast | Actor | Horace the Butler (uncredited) |
 Ralph Bellamy | Cast | Actor | Dr. R.L. Davis |
 Richard Cramer | Cast | Actor | Detective Bringing Vernon (uncredited) |
 Roscoe Karns | Cast | Actor | Monahan |
 Turhan Bey | Cast | Actor | Ahmed |
 Wade Boteler | Cast | Actor | Police Sergeant (uncredited) |
 William Frawley | Cast | Actor | Det. 'Hoppy' Hopkins |
 William Hopper | Cast | Actor | Police Secretary (uncredited) |
| Person | Type | Job | Role(s) |
