Full-bearded, fawning informant with glasses (as Paco Sanz)
Franco Gulà
Gravedigger, Clockmaker
José Canalejas
Mexican henchman
Bruno Arié
Older poker Player with no moustache
Remo Capitani
Publican in saloon
Antonio Decembrino
Juan Olaguivel
Targo (as Juan Olaguibel)
Giovanna Lenzi
Roberto Alessandri
Poker Player with moustache on Cats right
Giancarlo Bastianoni
Poker Player on Cats left with no moustache
Rufino Inglés
Old Mexican in mexican taverna
Arturo Fuento
José Terrón
'Flatface' - San Antonio Henchman (uncredited)
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Trivia
Pietro Martellanza was cast as Cat Stevens but broke his foot at the beginning of the shooting and was replaced by Terence Hill, who met Bud Spencer for the first time.
During the gunfight at the end, the fuse has been burning for a while and should be dozens of feet away but a distant view from above and behind Cat Stevens (Terence Hill) shows the fuse just starting to burn directly behind him.