 | Robert Bray als Mike Hammer |
 | Whitney Blake als Nancy Williams |
 | Donald Randolph als Colonel Holloway (as Don Randolph) |
 | Richard Garland als Louis |
 | Fred Essler als Ludwig Teller |
 | Booth Colman als Capt. Pat Chambers (as Booth Coleman) |
 | Pamela Duncan als Velda |
 | Genie Coree als Maria (as Gina Coré) |
 | Patricia Donahue als Dione |
| Jan Chaney als Red |
 | Terence de Marney als Jean (as Terence De Marney) |
 | Peter Mamakos als La Roche |
 | Claire Carleton als Nightclub Boss |
 | Phil Arnold als Shorty |
| Phil Victor | Director |
| George White | Director |
| Mickey Spillane | Novel |
| Richard Powell | Story |
| Richard Collins | Screenplay |
| Richard Powell | Screenplay |
| Marlin Skiles | Original Music Composer |
| Harry Neumann | Director of Photography |
| Frank Sullivan | Editor |
| Boris Leven | Production Design |
| Ross Dowd | Set Decoration |
| Frank Parmenter | Production Supervisor |
| Ralph Butler | Sound |
| Del Harris | Sound Effects Editor |
| Jill Campbell | Music Editor |
| Bert Henrikson | Costumer |
| Adele Parmenter | Costumer |
| Ruth Burch | Casting |
| Mollie Kent | Script Supervisor |
| Emile LaVigne | Makeup Artist |
| Alice Monte | Hairstylist |
| Charles Hannawalt | Key Grip |
