Yul BrynnerCol. Alexi Vlassov Virna LisiMrs. Annabel Lee Robert AldaPolygraph interrogator Farley GrangerComputer Programming Director Philippe NoiretLucien Berthon André FalconFrench Diplomat William SabatierMercadier François Maistreinspecteur Joss Paola PitagoraJeannine Santelli Eva Maria MeinekeMrs von Strelitz Nathalie NervalTatiana Vlassov Jean DesaillyNarrator (voice) (uncredited) Henri VerneuilRegista / Sceneggiatura / Produttore Gilles PerraultSceneggiatura Jacques SaulnierProduction Design Claude RenoirDirector Of Photography Hélène NourryCostume Design Marie-Madeleine ParisMakeup Artist Jean-Pierre EychenneMakeup Artist Lucile CostaSupervisore della Sceneggiatura Marc GrunebaumFirst Assistant Director Catherine GanzAssistant Editor Nadine MuseAssistant Editor Ennio MorriconeCompositore Musicale Originale Jean DrouinUnit Production Manager Jacques JuranvilleResponsabile di Produzione Jean-Pierre NossereauLocation Manager 
