Cliff Robertson

Character: David Frazer

Jack Hawkins

Character: Colonel Drexel

Marisa Mell

Character: Sophie

Michel Piccoli

Character: Georges Sarrassin

Bill Fraser

Character: Leslie Dunwoody

Charles Gray

Character: Benson

John Le Mesurier

Character: Sir Robert

Felix Aylmer

Character: Henrickson

Christopher Witty

Character: Prince Jamil

Tutte Lemkow

Character: Paviot

Ernest Clark

Character: Minister

Keith Pyott

Character: Gustave

Jose Burgos

Character: El Mono

Roger Delgado

Character: Ahmed bin Fayed

James Payne

Character: Russian Officer in Tent (uncredited)

Jerold Wells

Character: Brindle (uncredited)

George Roderick

Character: Officer at Circus (uncredited)