 | Peter Lee Lawrence als Jim 'The Kid' Slade |
 | John Ireland als Douglas |
 | Gloria Fernán Osuna als Marjorie |
 | Eduardo Fajardo als Chavel |
 | Calisto Calisti als Cassidy |
 | Luis de Tejada |
 | Raf Baldassarre als Verdugo |
 | Piero Lulli als J. Texas Corbett |
 | Andrea Scotti als il maniscalco |
 | Franco Pesce als Ben, il cassamortaro |
| Francesco Narducci als il barista |
 | Giovanni Ivan Scratuglia |
| Paola Natale als Elizabeth, la commessa dell'albergo |
| Giovanni Petti als Jeff Mortimer Logan |
 | Frank Braña als Joe, il postiglione della diligenza |
| Umberto Lenzi | Director |
| Francisco Ariza | First Assistant Director |
| Roberto Giandalia | Script Supervisor |
| Fernando Rossi | Unit Manager |
| Lamberto Andreani | Production Secretary |
| Ignacio Gutiérrez | Production Secretary |
| Vicente Vázquez | Makeup Artist |
| Raul Ranieri | Makeup Artist |
| Maurizio Trani | Assistant Makeup Artist |
| Marisa Laganga | Hairstylist |
| Raúl Pérez Cubero | Camera Operator |
| Renato Doria | Assistant Camera |
| Francesco Narducci | Still Photographer |
| Miguel Guzmán | Still Photographer |
| Pietro Spadoni | Sound |
| Saverio D'Eugenio | Production Design |
| Jaime Pérez Cubero | Set Decoration |
| José Luis Galicia | Set Decoration |
| Walter Patriarca | Costume Design |
| Daniele Alabiso | Editor |
| Angelo Francesco Lavagnino | Original Music Composer |
| Averoe Stefani | Production Manager |
| Eduardo Manzanos | Story |
| Marco Leto | Screenplay |
| Umberto Lenzi | Screenplay |
| Alejandro Ulloa | Director of Photography |
| Salvatore Alabiso | Producer |
