After two gang-related killings in "Center City," a suspect (who was framed) is arrested, released on bail...and murdered. Inspector Briggs of the FBI recruits a young agent, Gene Cordell, to go undercover in the shadowy Skid Row area (alias George Manly) as a potential victim of the same racket. Soon, Gene meets Alec Stiles, neurotic mastermind who's "building an organization along scientific lines." Stiles recruits Cordell, whose job becomes a lot more dangerous.
| Camera | Joseph MacDonald | Director of Photography |
| Directing | William Keighley | Director |
| Production | Samuel G. Engel | Producer |
| Editing | William Reynolds | Editor |
| Writing | Harry Kleiner | Screenplay |
| Camera | Frank Serjack | Still Photographer |
| Sound | Lionel Newman | Music Director |
| Art | Lyle R. Wheeler | Art Direction |
| Art | Chester Gore | Art Direction |
| Art | Thomas Little | Set Decoration |
| Costume & Make-Up | Ben Nye | Makeup Artist |
| Crew | Fred Sersen | Special Effects |
| Sound | W. D. Flick | Sound |
| Sound | Roger Heman Sr. | Sound |
| Costume & Make-Up | Kay Nelson | Costume Design |
| Costume & Make-Up | Thomas Tuttle | Makeup Artist |
| Directing | Henry Weinberger | Assistant Director |
| Art | Don B. Greenwood | Property Master |
| Crew | Jack N. Young | Stunts |
| Camera | Frank Cory | Grip |
| Camera | Till A. Gabbani | Camera Operator |
| Camera | Anthony Ugrin | Still Photographer |
| Costume & Make-Up | Charles LeMaire | Wardrobe Supervisor |
| Costume & Make-Up | Sam Benson | Wardrobe Supervisor |
| Sound | David Buttolph | Original Music Composer |
| Directing | Kathleen Fagan | Script Supervisor |
| Crew | Fred Fisher | Stand In |
| Production | Gene Bryant | Production Manager |
