 | Lee Van Cleef als Kiefer |
 | Catherine Spaak als Catherine |
 | Jim Kelly als Kashtok |
 | Barry Sullivan als Kane |
 | Jim Brown als Pike |
 | Fred Williamson als Tyree |
 | Dana Andrews als Morgan |
 | Harry Carey, Jr. als Dumper |
 | Robert Donner als Skave |
 | Charles McGregor als Cloyd |
 | Ronald Howard als Halsey |
 | Ricardo Palacios als Calvera |
 | Buddy Joe Hooker als Angel |
| Paul Costello als Card Player (uncredited) |
 | Hal Needham als Garmes (uncredited) |
 | George Rigaud als Horse Dealer (uncredited) |
 | Dean Selmier als Man in Saloon (uncredited) |
| Antonio Margheriti | Director |
| Eric Bercovici | Screenplay |
| Jerrold L. Ludwig | Screenplay |
| Harry Bernsen | Producer |
| Maria Luisa Alcaraz | Associate Producer |
| Leon Chooluck | Co-Producer |
| Jerry Goldsmith | Original Music Composer |
| Riccardo Pallottini | Director of Photography |
| Stanford C. Allen | Editor |
| Julio Molina | Art Direction |
| Agustín Jiménez | Costume Design |
| Hal Needham | Stunt Coordinator |
| Lucie Lichtig | Script Supervisor |
| Francisco Ardura | Production Coordinator |
| Mary Pepa Willis | Production Secretary |
| Phil Stern | Still Photographer |
| Alan Arnold | Unit Publicist |
| José María Ochoa | Unit Manager |
| Scott Maitland | Assistant Director |
| José López Rodero | Assistant Director |
| Hal Needham | Second Unit Director |
| Raúl Pérez Cubero | Second Unit Director of Photography |
| Carlo Tafani | Camera Operator |
| Jim Willis | Sound Mixer |
| Ángel Sevillano | Property Master |
| Agustín Jiménez | Wardrobe Supervisor |
| Carmen Martín | Makeup Artist |
| Luciano D'Achille | Special Effects |
| Antonio Molina | Special Effects |
| Juan Maján | Stunt Coordinator |
| Dennis Mosher | Assistant Editor |
| John Caper Jr. | Music Editor |
| Theodore Soderberg | Sound Re-Recording Mixer |
