Franco Nero as Yodlaf Peterson

Tomas Milian as El Vasco

Jack Palance as John

Fernando Rey as Prof. Xantos

Iris Berben as Lola

José Bódalo as General Mongo Alvarez

Karin Schubert as Zaire Harris

Eduardo Fajardo as Colonel

Gino Pernice as Tourneur

Tito García as Tiger

Gérard Tichy as Lieutenant

Lorenzo Robledo as Captain Jim

Álvaro de Luna as John's Henchman

Jesús Fernández as Teenage Xantista

Claudio Scarchilli as Mexican Officer

Giovanni Petti as Mexican Border Officer

Gianni Pulone as John's Henchman

Rafael Albaicín as Mongo Henchman (uncredited)

Simón Arriaga as Mongo Henchman (uncredited)

José Canalejas as Mongo Henchman (uncredited)

Cantori Moderni Di Alessandroni as Choir Member (uncredited)

Ramón Fernández Tejela as Xantista (uncredited)

Víctor Israel as Rosenbloom Henchman with Brown Suit (uncredited)

José Luis Lizalde as Cantina Barman (uncredited)

José Marco as Fort Yuma Corporal (uncredited)

Antonio Padilla as Mongo Henchman (uncredited)

Joaquín Parra as Mexican Patrol Lieutenant (uncredited)

Vicente Roca as Rosenbloom Henchman with Tropical Hat (uncredited)