The two brothers Trinity and Bambino are exchanged by two federal agents and take advantage of the situation to steal a huge booty hidden in a monastery by a gang of outlaws.
| Actor | Role |
|---|---|
 Terence HillTrinità | Trinità |
 Bud SpencerBambino | Bambino |
 Harry Carey Jr.Father | Father |
 Yanti SomerPerla | Perla |
 Jessica DublinMother | Mother |
 Enzo TarascioMitch | Mitch |
 Pupo De LucaPrior | Prior |
 Dana GhiaPerla's Mother | Perla's Mother |
| EEmilio Delle PianeJames Parker | James Parker |
 Enzo FiermontePerla's Father | Perla's Father |
 Antonio MonselesanWildcat Hendricks | Wildcat Hendricks |
 Franco ResselMaitre D' | Maitre D' |
 Riccardo PizzutiChief of Dallas Gunmen | Chief of Dallas Gunmen |
 Benito StefanelliStingary Smith | Stingary Smith |
 Fortunato ArenaParker Henchman | Parker Henchman |
 Gérard LandryClark | Clark |
 Jean LouisMurdock | Murdock |
 Luigi BonosBartender Ozgur | Bartender Ozgur |
 Gildo Di MarcoPeasant Injured by Monks | Peasant Injured by Monks |
 Adriano MicantoniDeputy | Deputy |
 Gilberto GalimbertiPoker Player with Eye Patch | Poker Player with Eye Patch |
| BBruno BoschettiNot listed | Not listed |
 Vittorio FanfoniNot listed | Not listed |
 Renzo PevarelloHitman at Mission (uncredited) | Hitman at Mission (uncredited) |
 Nello PalladinoStevens (uncredited) | Stevens (uncredited) |