Mystery writer Mickey Spillane tries to help Clyde Beatty deal with a plot to sabotage his circus.
| Writing | Philip MacDonald | Screenplay |
| Writing | Paul Fix | Screenplay |
| Writing | James Edward Grant | Screenplay |
| Directing | James Edward Grant | Director |
| Sound | Ed Borschell | Sound Recordist |
| Production | John Wayne | Producer |
| Production | Robert Fellows | Producer |
| Sound | Emil Newman | Original Music Composer |
| Sound | Arthur Lange | Original Music Composer |
| Production | D. Ross Lederman | Associate Producer |
| Editing | Fred MacDowell | Editor |
| Camera | Edwin B. DuPar | Director of Photography |
| Sound | Paul Dunlap | Original Music Composer |
| Art | Victor A. Gangelin | Set Decoration |
