Bruno Fioretti, known as "Mandrake", is an inveterate gambler who never misses a day at the horse racing track in Rome. He is doubly unlucky: he bets too much on one horse, and his wife is sleeping with his best friend because Mandrake is always at the track. Penniless and cuckolded, Mandrake decides to make one last bet.

Gigi Proietti
as Bruno "Mandrake" Fioretti

Enrico Montesano
as Armando "Er Pomata" Pellicci

Catherine Spaak
as Gabriella

Mario Carotenuto
as De Marchis

Francesco De Rosa
as Felice Roversi

Maria Teresa Albani
as Fortune-teller

Gigi Ballista
as Count Dallara

Nikki Gentile
as Mafalda

Adolfo Celi
as President of the Court

Ennio Antonelli
as Otello "Manzotin" Rinaldi