 | Chet Bacon als OP |
 | Diana Lorys als Dinah |
 | Luciano Pigozzi als Don Wilson |
 | Roberto Camardiel als Sheriff Noonan |
 | Antonio Mayans |
 | Daniel Martín als Max Thaler |
| Nat Greenwood |
| Adolfo Thous |
| Eduardo Bea |
| Francisco Clement |
 | Francisco Casares |
| Manuela Alcardi |
 | Lone Fleming |
| José Yepes |
| Jesús Enguita |
 | Antonio Molino Rojo als Peter |
| Juan Bosch | Director |
| Antonio Girasante | Producer |
| Cruz María Baleztena | Set Decoration |
| Dashiell Hammett | Novel |
| José María Cunillés | Producer |
| Franco Julian | Music |
| Alberto De Stefanis | Writer |
| José Antonio Rojo | Editor |
| Santiago Zuazo | Focus Puller |
| Margarita Fernández | Script Supervisor |
| Gino Santini | Director of Photography |
| Concepción Piño | Assistant Editor |
| Juan Bosch | Writer |
| Alberto Grimaldi | Executive Producer |
| Ricardo Navarrete | Camera Operator |
| Luis Marin | Producer |
| Zacarías Urbiola | Assistant Director |
