Ty Hardin
— Jason
Michael Rennie
— Major Worthington Clark
Paola Pitagora
— Greta
Vittorio Caprioli
— Billy 'Pizza'
Gordon Mitchell
— The Albanian
Vassili Karis
— Autista del bulgaro
Giulio Coltellacci
— Mister Lloyd
Graziella Granata
— Rumba
Ferdinando Poggi
— Inspector Starkis
Hum Silvers
Remo De Angelis
— Il bulgaro
Valentino Macchi
Gianni Di Segni
— Bulgarian Henchman (uncredited)