| Person | Type | Job | Role(s) |
|---|---|---|---|
 Adolfo Cofiño | Crew | Art | Production Design |
 Alejandro Ulloa | Crew | Camera | Director of Photography |
Antonio Forrest | Crew | Sound | Sound Engineer |
Antonio Morelli | Crew | Production | Executive Producer |
Dino Maiuri | Crew | Writing | Screenplay |
 Ennio Morricone | Crew | Sound | Original Music Composer |
Eugenio Alabiso | Crew | Editing | Editor |
Fritz Ebert | Crew | Writing | Screenplay |
Giovanni Bergamini | Crew | Camera | Camera Operator |
Italo Cameracanna | Crew | Sound | Sound Effects Editor, Foley Artist |
José Frade | Crew | Writing | Dialogue, Co-Producer |
Jürgen Henze | Crew | Costume & Make-Up | Costume Design |
Manfred R. Köhler | Crew | Directing | Assistant Director |
 Massimo De Rita | Crew | Writing | Screenplay |
Sabatino Ciuffini | Crew | Directing | Assistant Director |
 Sergio Corbucci | Crew | Writing | Screenplay, Director, Story |
Osanna Guardini | Crew | Costume & Make-Up | Wardrobe Assistant |
Giuseppe Capogrosso | Crew | Costume & Make-Up | Makeup Artist |
Ricardo Huertas | Crew | Directing | Assistant Director |
Stan Atkins | Crew | Production | Associate Producer |
Stan Gelt | Crew | Production | Executive Producer |
Antonio Padilla | Cast | Mongo Henchman (uncredited) | |
 Claudio Scarchilli | Cast | Actor | Mexican Officer |
 Eduardo Fajardo | Cast | Actor | Colonel |
 Fernando Rey | Cast | Actor | Prof. Xantos |
 Franco Nero | Cast | Actor | Yodlaf Peterson |
Gianni Pulone | Cast | Actor | John's Henchman |
 Gino Pernice | Cast | Actor | Tourneur |
 Gérard Tichy | Cast | Actor | Lieutenant |
 Iris Berben | Cast | Actress | Lola |
 Jack Palance | Cast | Actor | John |
Jesús Fernández | Cast | Actor | Teenage Xantista |
Joaquín Parra | Cast | Mexican Patrol Lieutenant (uncredited) | |
 José Bódalo | Cast | Actor | General Mongo Alvarez |
 José Canalejas | Cast | Actor | Mongo Henchman (uncredited) |
 Karin Schubert | Cast | Actress | Zaire Harris |
 Lorenzo Robledo | Cast | Actor | Captain Jim |
 Rafael Albaicín | Cast | Actor | Mongo Henchman (uncredited) |
Ramón Fernández Tejela | Cast | Xantista (uncredited) | |
Simón Arriaga | Cast | Actor | Mongo Henchman (uncredited) |
 Tito García | Cast | Actor | Tiger |
 Tomas Milian | Cast | Actor | El Vasco |
 Vicente Roca | Cast | Actor | Rosenbloom Henchman with Tropical Hat (uncredited) |
 Víctor Israel | Cast | Actor | Rosenbloom Henchman with Brown Suit (uncredited) |
 Álvaro de Luna | Cast | Actor | John's Henchman |
 José Marco | Cast | Actor | Fort Yuma Corporal (uncredited) |
Giovanni Petti | Cast | Mexican Border Officer | |
José Luis Lizalde | Cast | Actor | Cantina Barman (uncredited) |
Cantori Moderni Di Alessandroni | Cast | Choir Member (uncredited) | |
| Person | Type | Job | Role(s) |
