Onion Jack has bought a piece of land on which to settle, but the property is still in possession of the orphans of the original owner and is coveted by the local oil baron.
| Writing | Luciano Vincenzoni | Screenplay |
| Writing | Sergio Donati | Story |
| Writing | Luciano Vincenzoni | Story |
| Directing | Enzo G. Castellari | Director |
| Writing | Sergio Donati | Screenplay |
| Production | Zev Braun | Producer |
| Production | Giancarlo Pettini | Executive Producer |
| Production | Carlo Ponti | Producer |
| Production | Ronald A. Tash | Executive Producer |
| Sound | Guido De Angelis | Music |
| Sound | Maurizio De Angelis | Music |
| Camera | Alejandro Ulloa | Director of Photography |
| Editing | Gianfranco Amicucci | Editor |
| Art | Alberto Boccianti | Art Direction |
| Costume & Make-Up | Enrico Job | Costume Design |
| Costume & Make-Up | Giusy Bovino | Hairstylist |
| Costume & Make-Up | Walter Cossu | Makeup Artist |
| Costume & Make-Up | Gino Zamprioli | Makeup Artist |
| Production | Valentín Panero | Production Manager |
| Directing | Luis Gómez Valdivieso | Assistant Director |
| Directing | Mario Maffei | Second Unit Director |
| Art | Gumersindo Andrés | Assistant Art Director |
| Sound | Tonino Cacciottolo | Sound Effects |
| Sound | Gianni D'Amico | Sound Mixer |
| Sound | Luis López | Sound Engineer |
| Crew | Antonio Parra | Special Effects |
| Visual Effects | Emilio Ruiz del Río | Visual Effects |
| Crew | Rocco Lerro | Stunts |
| Crew | Juan Manuel Torres | Stunts |
| Crew | Massimo Vanni | Stunts |
| Crew | Nazzareno Zamperla | Stunt Coordinator |
| Camera | Roberto Girometti | Camera Operator |
| Camera | Eduardo Noé | Camera Operator |
| Camera | Guillermo Peña | Assistant Camera |
| Costume & Make-Up | Benito Persico | Assistant Costume Designer |
| Editing | Cesarina Casini | Assistant Editor |
| Editing | María Luisa Pino | Assistant Editor |
| Sound | Gianfranco Plenizio | Conductor |
| Directing | Maria Luisa Merci | Script Supervisor |
| Crew | Rocco Lerro | Master at Arms |
