 | Lionel Atwill als Dr. Jerry Xavier |
 | Fay Wray als Joanne Xavier |
 | Lee Tracy als Lee Taylor |
 | Preston Foster als Dr. Wells |
 | John Wray als Dr. Haines |
 | Harry Beresford als Dr. Duke |
 | Arthur Edmund Carewe als Dr. Rowitz |
 | Leila Bennett als Mamie |
 | Robert Warwick als Commissioner Stevens |
 | George Rosener als Otto, Dr. Xavier's Butler |
 | Willard Robertson als Detective O'Halloran |
 | Thomas E. Jackson als Daily World Editor |
 | Harry Holman als Mike, Waterfront Policeman |
 | Mae Busch als Cathouse Madame |
 | Tom Dugan als Sheriff |
| Raoul Freeman als Morgue Detective (Uncredited) |
 | Selmer Jackson als Willard Keefe, Daily World Night Editor (Uncredited) |
| Charles McMurphy als Detective at Headquarters (Uncredited) |
| Ky Robinson als Morgue Detective (Uncredited) |
 | Louise Beavers als Louise (Uncredited) |
| Anton Grot | Art Direction |
| Hal B. Wallis | Executive Producer |
| George Amy | Editor |
| Ray Rennahan | Director of Photography |
| Michael Curtiz | Director |
| Darryl F. Zanuck | Executive Producer |
| George Rosener | Screenplay |
| Ruth Pursley | Hairstylist |
| Earl Baldwin | Screenplay |
| Perc Westmore | Makeup Artist |
| Robert Tasker | Screenplay |
| Ray Romero | Makeup Artist |
| Richard Towers | Director of Photography |
| Bernhard Kaun | Original Music Composer |
| William Forsyth | Casting Assistant |
| William Maybery | Casting Assistant |
| Scotty Welbourne | Still Photographer |
| William Williams | Camera Operator |
| Rufus Le Maire | Casting |
| Natalie Kalmus | Color Designer |
| Herbert Plews | Props |
| Robert B. Lee | Sound Recordist |
| Ernest Haller | Camera Operator |
| Howard Warren Comstock | Theatre Play |
| Leo F. Forbstein | Conductor |
| Allen C. Miller | Theatre Play |
| Al Alleborn | Assistant Director |
| Owen Crompton | Grip |
| Thad Brooks Jr. | Assistant Camera |
| Ellsworth Fredericks | Camera Operator |
| Floyd Lee | Assistant Camera |
| Marshall Hageman | Assistant Director |
| Fred Jackman Jr. | Special Effects |
| W. Howard Greene | Camera Operator |
| Carl E. Guthrie | Camera Operator |
