Credits
Sergio LEONE - Director
Sergio DONATI - Script / Dialogue
Luciano VINCENZONI - Script / Dialogue
Roberto DE LEONARDIS - Script / Dialogue
Carlo TRITTO - Script / Dialogue
Giuseppe RUZZOLINI - Cinematography
Andrea CRISANTI - Set decorator
Ennio MORRICONE - Music
Nino BARAGLI - Film Editor
Fausto ANCILLAI - Sound
Sergio LEONE - Script / Dialogue
Casting
Rod STEIGER - Juan Miranda
James COBURN - John H. Mallory
Romolo VALLI - Dr. Villega
Maria MONTI - Adelita