Neil Connery
Dr. Neil Connery
Daniela Bianchi
Maya Rafis
Adolfo Celi
Mr. Thai - 'Beta'
Agata Flori
Mildred
Bernard Lee
Commander Cunningham
Anthony Dawson
Alpha
Lois Maxwell
Miss Maxwell
Yee-Wah Yang
Yachuko (as Yachuco Yama)
Franco Giacobini
Juan
Ana María Noé
Lotte Krayendorf
Guido Lollobrigida
Kurt
Francesco Tensi
Auctioneer
Margherita Horowitz
(creditOnly)
Enzo Consoli
Sitting Man at Lecture (as Vincenzo Consoli)
Mirella Pamphili
(as Mirella Pompili)
Nando Angelini
Ward Jones
Lanfranco Ceccarelli
Assassin (as Franco Ceccarelli)
Aldo Cecconi
Wilson
Antonio Gradoli
Monte Carlo inspector
Fajda Nicol
Henchwoman (as Faida Nicol)
Caterina Trentini
(as Kathleen Trentini)
Leonardo Scavino
Ben AHmed (as Leo Scavino)
Kitty Swan
Co-agent on ship (uncredited)