 Sidney BlackmerPolice Commissioner Thatcher Colt | Police Commissioner Thatcher Colt |
 Rick VallinAnthony 'Tony' Abbot (as Ricki Vallin) | Anthony 'Tony' Abbot (as Ricki Vallin) |
 Byron FoulgerEverett P. Digberry | Everett P. Digberry |
 Herbert RawlinsonDistrict Attorney Bill Dougherty | District Attorney Bill Dougherty |
| LLynn StarrMiss Spencer | Miss Spencer |
 Barry BernardCapt. Edgar Walters / Frank Galloway | Capt. Edgar Walters / Frank Galloway |
| TTrude RosenNina Politza | Nina Politza |
| TThornton EdwardsEnrico Lombardi | Enrico Lombardi |
 John IncePolice Captain Mike Flynn | Police Captain Mike Flynn |
 Martin AsheOfficer Murphy | Officer Murphy |
 Walter JamesPolice Captain Tom Henry | Police Captain Tom Henry |
 Frank DarienSamuel Wilkins | Samuel Wilkins |
| JJoseph DeVillardAntonio Spogucci (as Joseph M. De Villard) | Antonio Spogucci (as Joseph M. De Villard) |
| JJacques VanaireGuiseppe Bartarelli (as Jack Vanaire) | Guiseppe Bartarelli (as Jack Vanaire) |
 Willy CastelloJohn Martin George (as William Castello) | John Martin George (as William Castello) |
| HHarry ClarkOfficer Lou Levinsky (as Harry Clarke) | Officer Lou Levinsky (as Harry Clarke) |
| LLew LeroyApartment Manager (as Lou LeRoy) | Apartment Manager (as Lou LeRoy) |
 Billy MitchellNicodemus J. Brown | Nicodemus J. Brown |
 Florence O'BrienPetunia | Petunia |
| HHarte WayneCoroner | Coroner |
| PPat McKeeJoe Morgan | Joe Morgan |
| CCasey MacGregorPolice Sergeant Flanagan (as Casey McGregor) | Police Sergeant Flanagan (as Casey McGregor) |
| BBilly SnyderHotel Manager Stevens | Hotel Manager Stevens |
 Sam LufkinLombardi's Police Escort (uncredited) | Lombardi's Police Escort (uncredited) |
