After straight-arrow district attorney Joseph Foster says in frustration that he would sell his soul to bring down a local mob boss, a smooth-talking stranger named Nick Beal shows up with enough evidence to seal a conviction. When that success leads Foster to run for governor, Beal's unearthly hold on him turns the previously honest man corrupt, much to the displeasure of his wife and his steadfast minister.
| Writing | Jonathan Latimer | Screenplay |
| Directing | John Farrow | Director |
| Editing | Eda Warren | Editor |
| Writing | Mindret Lord | Story |
| Sound | Franz Waxman | Original Music Composer |
| Production | Endre Bohem | Producer |
| Camera | Lionel Lindon | Director of Photography |
| Costume & Make-Up | Wally Westmore | Makeup Supervisor |
| Editing | Eda Warren | Supervising Editor |
| Sound | Van Cleave | Orchestrator |
| Costume & Make-Up | Delven Armstrong | Makeup Artist |
| Art | Ross Dowd | Set Decoration |
| Art | Hans Dreier | Art Direction |
| Sound | Gene Garvin | Sound |
| Art | Sam Comer | Set Decoration |
| Lighting | Stanley Williams | Gaffer |
| Directing | Francisco Day | Assistant Director |
| Camera | Charles Sickler | Grip |
| Production | John L. Murphy | Production Manager |
| Directing | Charles Morton | Script Supervisor |
| Camera | Ed Henderson | Still Photographer |
| Sound | Philip Wisdom | Sound |
| Costume & Make-Up | Merle Reeves | Hairstylist |
| Art | Franz Bachelin | Art Direction |
| Sound | Sidney Cutner | Orchestrator |
| Production | Stanley Goldsmith | Production Manager |
| Costume & Make-Up | Mary Kay Dodson | Costume Designer |
| Sound | George Parrish | Orchestrator |
| Camera | William Rand | Camera Operator |
| Costume & Make-Up | Gale McGarry | Hairstylist |
| Sound | Leonid Raab | Orchestrator |
| Costume & Make-Up | Ted Larsen | Makeup Artist |
