A secret agent goes after the gang that stole the crown jewels of a European monarchy.
| Directing | Clifford Smith | Director |
| Directing | Ford Beebe | Director |
| Writing | Dashiell Hammett | Characters |
| Writing | Wyndham Gittens | Screenplay |
| Writing | Norman S. Hall | Screenplay |
| Writing | Leslie Swabacker | Screenplay |
| Writing | Ray Trampe | Screenplay |
