When a hard-working machinist loses a promotion to a Polish-born worker, he is seduced into joining the secretive Black Legion, which intimidates foreigners through violence.
| Directing | Archie Mayo | Director |
| Production | Jack L. Warner | Executive Producer |
| Writing | Abem Finkel | Screenplay |
| Art | Robert M. Haas | Art Direction |
| Production | Hal B. Wallis | Executive Producer |
| Production | Robert Lord | Producer |
| Writing | William Wister Haines | Screenplay |
| Editing | Owen Marks | Editor |
| Writing | Robert Lord | Story |
| Camera | George Barnes | Director of Photography |
| Sound | Howard Jackson | Music |
| Crew | C.A. Riggs | Sound Recordist |
| Sound | W. Franke Harling | Music |
| Sound | Bernhard Kaun | Original Music Composer |
| Directing | Jack Sullivan | Assistant Director |
| Costume & Make-Up | Milo Anderson | Costume Design |
| Crew | Hans F. Koenekamp | Special Effects |
| Crew | Fred Jackman Jr. | Special Effects |
| Production | Frank Mattison | Unit Manager |
| Directing | Michael Curtiz | Co-Director |
