Cliff Robertson
— David Frazer
Jack Hawkins
— Colonel Drexel
Marisa Mell
— Sophie
Michel Piccoli
— Georges Sarrassin
Bill Fraser
— Leslie Dunwoody
Charles Gray
— Benson
John Le Mesurier
— Sir Robert
Felix Aylmer
— Henrickson
Christopher Witty
— Prince Jamil
Tutte Lemkow
— Paviot
Ernest Clark
— Minister
Keith Pyott
— Gustave
Jose Burgos
— El Mono
Roger Delgado
— Ahmed bin Fayed
James Payne
— Russian Officer in Tent (uncredited)
Jerold Wells
— Brindle (uncredited)
George Roderick
— Officer at Circus (uncredited)