 | Franco Nero als Sergei Kowalski, The Polish |
 | Tony Musante als Paco Roman |
 | Jack Palance als Ricciolo ("Curly") |
 | Giovanna Ralli als Columba |
 | Franco Giacobini als Pepote |
 | Eduardo Fajardo als Alfonso García |
 | Franco Ressel als Studs |
 | Álvaro de Luna als Ramon |
 | Raf Baldassarre als Mateo |
 | Joe Kamel als Sebastian |
 | Lorenzo Robledo als Officer |
| Ugo Adinolfi |
| José María Aguinaco als Ramirez |
| Simón Arriaga als Simón |
 | José Canalejas als Lerkin |
 | Juan Cazalilla als Mayor |
 | Remo De Angelis als Hudo |
| Alejandro de Enciso als Juan |
| Tito García als Garcia's Cousin (uncredited) |
| A. Jiménez Castellanos als (uncredited) |
| Guillermo Méndez als Captain (uncredited) |
 | Enrique Navarro als Notary (uncredited) |
 | Francisco Nieto als Antonio (uncredited) |
| Ángel Ortiz als Mexican #3 (uncredited) |
 | Julio Peña als (uncredited) |
 | Milo Quesada als Marco (uncredited) |
| Herman Reynoso als Curly's 2nd Man (uncredited) |
 | José Riesgo als Garcia's Brother (uncredited) |
| Lorenzo Robledo als Officer (uncredited) |
 | Vicente Roca als Elias Garcia (uncredited) |
| Fernando Villena als Sergeant (uncredited) |
| José Luis Lizalde als Innkeeper (uncredited) |
 | Ángel Álvarez als Notary (uncredited) |
| Giorgio Arlorio | Story |
| Franco Solinas | Story |
| Sergio Corbucci | Director |
| Luciano Vincenzoni | Screenplay |
| Ennio Morricone | Original Music Composer |
| Eugenio Alabiso | Editor |
| Alejandro Ulloa | Director of Photography |
| Alberto Grimaldi | Producer |
| Pietro Nofri | Unit Manager |
| Orlando Pierfederici | Production Secretary |
| Serafín García Trueba | Production Secretary |
| José Nuño de la Rosa | Production Secretary |
| Raul Ranieri | Makeup Artist |
| Alejandro Millón | Makeup Artist |
| Giusy Bovino | Hairstylist |
| Carlo Diotallevi | Sound |
| Alfredo Polo | Sound |
| Renato Cadueri | Sound Mixer |
| Remo De Angelis | Master at Arms |
| Filiberto Fiaschi | First Assistant Director |
| Ricardo Huertas | First Assistant Director |
| Sergio Bergamini | Camera Operator |
| Franca Invernizzi | Script Supervisor |
| Hans Burmann | Camera Operator |
| Isidro Muro | Assistant Camera |
| Julio Leyva | Assistant Camera |
| Antonio Benetti | Still Photographer |
| Pina Triunveri | Assistant Editor |
| Piero Filippone | Production Design |
| Jürgen Henze | Costume Design |
| Luis Vázquez | Production Design |
| Vázquez Hermanos | Set Decoration |
| Celeste Battistelli | Special Effects |
| Bruno Nicolai | Original Music Composer |
| Sergio Spina | Co-Writer |
| Adriano Bolzoni | Co-Writer |
| Sergio Corbucci | Co-Writer |
| Francesco Merli | Production Manager |
| Manuel Castedo | Production Manager |
| Francesco Merli | Associate Producer |
| Luis Vázquez | Art Direction |
| Luis Vázquez | Set Decoration |
