 Richard WidmarkSkip McCoy | Skip McCoy |
 Jean PetersCandy | Candy |
 Thelma RitterMoe Williams | Moe Williams |
 Murvyn VyeCaptain Dan Tiger | Captain Dan Tiger |
 Richard KileyJoey | Joey |
 Willis BoucheyZara | Zara |
 Milburn StoneDetective Winoki | Detective Winoki |
 Parley BaerHeadquarters Communist in Chair (uncredited) | Headquarters Communist in Chair (uncredited) |
 Chet BrandenburgFight Spectator (uncredited) | Fight Spectator (uncredited) |
| FFrank KumagaiLum (uncredited) | Lum (uncredited) |
 Virginia CarrollNurse (uncredited) | Nurse (uncredited) |
 Harry CarterDetective Dietrich (uncredited) | Detective Dietrich (uncredited) |
 Clancy CooperDetective Eddie (uncredited) | Detective Eddie (uncredited) |
 Henry SlateDetective MacGregor (uncredited) | Detective MacGregor (uncredited) |
 Heinie ConklinSubway Passenger (uncredited) | Subway Passenger (uncredited) |
 George EldredgeFenton (uncredited) | Fenton (uncredited) |
 John GallaudetDetective Lieutenant Campion (uncredited) | Detective Lieutenant Campion (uncredited) |
 Alan ReedDetective (uncredited) | Detective (uncredited) |
| RRobert HainesLibrary Worker (uncredited) | Library Worker (uncredited) |
| JJay Loft-LynMicrofilm Library Clerk (uncredited) | Microfilm Library Clerk (uncredited) |
 Ray MontgomeryRay, FBI Agent (uncredited) | Ray, FBI Agent (uncredited) |
| JJerry O'SullivanFBI Agent Enyart (uncredited) | FBI Agent Enyart (uncredited) |
| RRay StevensFBI Agent (uncredited) | FBI Agent (uncredited) |
 Ralph MoodyCoffin Boat Captain (uncredited) | Coffin Boat Captain (uncredited) |
 Roger MooreMr. Victor (uncredited) | Mr. Victor (uncredited) |
| VVic PerryLightning Louie (uncredited) | Lightning Louie (uncredited) |
 George E. StoneWillie, Police Desk Clerk (uncredited) | Willie, Police Desk Clerk (uncredited) |
| KKing MojaveElevator Passenger (uncredited) | Elevator Passenger (uncredited) |
 Harry TenbrookElevator Passenger (uncredited) | Elevator Passenger (uncredited) |
 Stuart RandallPolice Commissioner (uncredited) | Police Commissioner (uncredited) |
