- Lee Hoffmannovel "The Valdez Horses"
- Clair Huffakerscreenplay
- Massimo De Rita(uncredited)
- Stephen Gellerscreenplay (uncredited)
- Dino Maiuri(uncredited)
- Rafael J. Salvia(uncredited)
- José Nieto(as Jose Nieto)
- Diana Lorys(scenes deleted) (as Diana Loris)
- Conchita Muñoz(as Conchita Munoz)
- Henri Bidon(as Henri Bidon Mikaleffs)
Rest of cast listed alphabetically
- Florencio Amarilla(uncredited)
- Eduardo García(uncredited)
- Luis Prendes(uncredited)
- Ricardo Rodríguez(uncredited)
- Adolfo Thous(uncredited)
- Juan Manuel Torres Gómez(uncredited)
- John Sturgesproducer
- Duilio Colettiproducer (uncredited)
- Dino De Laurentiisproducer (uncredited)
- Armando Nannuzzidirector of photography
- Godofredo Pacheco(uncredited)
- Luis Álvarez(as Luis Alvarez)
- Giannetto De Rossimakeup artist
- Roberto Coccoproduction manager
- Vicente Sempereproduction manager
- Roberto Bodegasassistant director
- Antonio Tarruellaassistant director (as Tony Tarruella)
- Boris Juragaset dresser
- Miguel Pedregosastunt performer (uncredited)
- Alfonso Avincolastill photographer
- Giuseppe Berardinicamera operator
- José Antonio Villalbaassistant camera (as Jose A. Villalba Rodriguez)
- Giorgio De Vincenzoassistant editor
- Peter Zinnersupervising editor
- Dandy Lioncomposer: song "Freedom Rainbow"
- John Francoscript supervisor
- Javier Gordilloproduction assistant (as Javier Gordillo Martino)
- Marguerite Théouleproduction assistant (as Marguerite Theoule)
- Maria Pia Di Meovoice dubbing: Jill Ireland (uncredited)
- Arturo Dominicivoice dubbing: Ettore Manni (uncredited)
- Michele Gamminovoice dubbing (uncredited)
- Sergio Grazianivoice dubbing: Marcel Bozzuffi (uncredited)
- Edward Mannixvoice dubbing: Ettore Manni- English version (uncredited)
- Gianni Marzocchivoice dubbing: Luis Prendes (uncredited)
- Giuseppe Rinaldivoice dubbing: Charles Bronson (uncredited)
Crew verified as complete
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