 | Gian Maria Volonté als Professor Brett Fletcher |
 | Tomas Milian als Solomon 'Beauregard' Bennet |
 | William Berger als Charley Siringo |
 | Jolanda Modio als Maria |
 | Gianni Rizzo als Williams |
 | Carole André als Elizabeth Wilkins |
 | Ángel del Pozo als Maximilian de Winton |
 | Aldo Sambrell als Zachary Shawn |
 | Nello Pazzafini als Vance |
 | José Torres als Aaron Chase |
 | Linda Veras als Cathy |
 | Antonio Casas als Leading Citizen of Puerto del Fuego |
 | Frank Braña als Jason |
 | Lorenzo Robledo als Wallace |
 | Guy Heron als Sheriff at de Winton Estate |
 | Rossella D'Aquino als Sandy / Sally |
 | Giovanni Ivan Scratuglia als Taylor Henchman |
 | Lidia Alfonsi als Belle de Winton |
| Sergio Sollima | Director |
| Sergio Sollima | Screenplay |
| Sergio Donati | Screenplay |
| Sergio Sollima | Story |
| Ennio Morricone | Original Music Composer |
| Alberto Grimaldi | Producer |
| Arturo González | Producer |
| Eugenio Alabiso | Editor |
| Rafael Pacheco | Director of Photography |
| Igino Lardani | Title Designer |
| Pietro Nofri | Unit Manager |
| Romano Raschi | Production Secretary |
| Mario Campolunghi | Production Secretary |
| Lamberto Andreani | Production Secretary |
| Rino Carboni | Makeup Artist |
| Giusy Bovino | Hairstylist |
| Rossano Caporicci | Assistant Makeup Artist |
| Renato Cadueri | Sound Mixer |
| Maurizio Mein | First Assistant Director |
| Mariano Canales | First Assistant Director |
| Luigina Lovari | Script Supervisor |
| Gastone Di Giovanni | Camera Operator |
| Ruggero Radicchi | First Assistant Camera |
| Elio Pacella | Sound |
| Rosanna Andreoni | Assistant Costume Designer |
| Rafael Ferri | Assistant Production Design |
| Antonio Palombi | Assistant Production Design |
| Carlo Simi | Production Design |
| Carlo Simi | Costume Design |
| Bruno Nicolai | Conductor |
| Eros Bacciucchi | Special Effects |
| Thomas Sagone | Production Manager |
| Aldo Pomilia | Line Producer |
