Alain Delon character Mr. Robert Klein
Jeanne Moreau character Florence Klein
Francine Bergé character Nicole (as Francine Berge)
Juliet Berto character Jeanine
Jean Bouise character Seller
Suzanne Flon character Doorwoman
Massimo Girotti character Charles
Michael Lonsdale character Pierre (as Michel Lonsdale)
Michel Aumont character Jew Affairs Section Official
Roland Bertin character Newspaper Director
Jean Champion character Diener
Etienne Chicot character Policeman
Magali Clément character Lola (as Magali Clement)
Gérard Jugnot character Photographer
Hermine Karagheuz character Young Worker
Dany Kogan character Michelle
Jacques Maury character Professor Montandon
Fred Personne character Police Commissioner
Francine Racette character Françoise / Cathy / Isabelle
Isabelle Sadoyan character Examined Woman
Louis Seigner character Mr. Klein's Father
Lucienne Le Marchand character (as Lucienne Lemarchand)
Pierre Vernier character Policeman
Joseph Losey character Un Homme au Vel d'Hiv (uncredited)
Brigitte Ariel character (uncredited)
Marius Balbinot character (uncredited)
Maurice Baquet character Un musicien (uncredited)
Philippe Brizard character (uncredited)
Jenny Clève character (uncredited)
Raymond Danon character (uncredited)
Thierry de Brem character (uncredited)
Christian de Tillière character Le Commissaire-Priseur (uncredited)
Michel Delahaye character (uncredited)
Bernard-Pierre Donnadieu character Extra (uncredited)
Pierre Frag character Le Marchand de Journaux (uncredited)
Mireille Franchino character (uncredited)
David Gabison character Le Groom (uncredited)
Maurice Jany character Le Chauffeur à Ivry-Bataille (uncredited)
Stephane Quatrehomme character Le Fils de Pierre (uncredited)
Jean Topart character La Voix du Speaker (voice) (uncredited)
Danielle Verne character Une Déportée (uncredited)