 Donald CookFBI Agent Dave Elliott | FBI Agent Dave Elliott |
 Evalyn KnappMaxine Travers | Maxine Travers |
 Theodore von EltzMr. Walsh | Mr. Walsh |
 Warren HymerTerence 'Midget' Regan | Terence 'Midget' Regan |
 J. Carrol Naish'Lefty' Tate | 'Lefty' Tate |
 Herbert RawlinsonJ.W. Keaton | J.W. Keaton |
 Kane RichmondJ.W. 'Jack' Keaton, Jr. | J.W. 'Jack' Keaton, Jr. |
 Edward HearnInsp. Stone | Insp. Stone |
 James P. BurtisLacey | Lacey |
 Clay ClementInsp. Arthur M. Preston | Insp. Arthur M. Preston |
| RReed HowesFBI Agent Bob Arnold | FBI Agent Bob Arnold |
 Morgan WallaceH. Van Cleve | H. Van Cleve |
| MMonte CarterGiuseppe Tomasso Giaconelli | Giuseppe Tomasso Giaconelli |
 Al BridgeHanover - Walsh's Henchman | Hanover - Walsh's Henchman |
| EEarl EbyFBI Agent Nash | FBI Agent Nash |
 Lynton BrentFBI Agent Connors | FBI Agent Connors |
 George ChesebroSardo - Walsh's Henchman | Sardo - Walsh's Henchman |
| MMary GwynneWoman | Woman |
 Frank MarloweG-Man | G-Man |
| LLillian CastleMary - Old Barfly | Mary - Old Barfly |
 Donald KerrReporter | Reporter |
| EEdwin ArgusCharacter | Character |
| JJack GustinHenchman | Henchman |
 David WorthFBI Agent | FBI Agent |
| AAllen ConnorOfficial | Official |
 Tom BrowerElderly Man | Elderly Man |
 Harry HarveyShort Pool Player | Short Pool Player |
 Robert HomansFat Pool Player | Fat Pool Player |
| AAllan CavanOne of Keaton's Lieutenants | One of Keaton's Lieutenants |
 Earl DwireSecretary | Secretary |
