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

Franco Giacobini

Juan

Guido Lollobrigida

Kurt

Margherita Horowitz

(creditOnly)

Enzo Consoli

Sitting Man at Lecture (as Vincenzo Consoli)

Mirella Pamphili

(as Mirella Pompili)

Aldo Cecconi

Wilson

Antonio Gradoli

Monte Carlo inspector

Caterina Trentini

(as Kathleen Trentini)

Leonardo Scavino

Ben AHmed (as Leo Scavino)

Kitty Swan

Co-agent on ship (uncredited)