Patrick Dewaere
Paul Kerjean
Michel Auclair
Michel Saint-Claude, director of GTI-Europe
Caroline Cellier
Hélène Kerjean
Charles Denner
Walter, private detective
Anny Duperey
Laura Weber, JBL's mistress
Jeanne Moreau
Madame Benoît-Lambert
Mel Ferrer
Cornelius A. Woaegen, president of GTI
Jean-Laurent Cochet
Serge Hartmann, director of La Tribune
Fernand Ledoux
Mr. Guérande
André Falcon
Pierre Bayen, editor-in-chief
Claude Vernier
Dr. Gerhard Kramer
Édith Scob
Madame Bronsky
Jacques François
Fred Great
Robert Party
Jacques Benoît-Lambert, aka 'JBL'
Jean-Pierre Kalfon
Bronsky, then Stan Hankins, the informant
Jean Mercure
Joachim Holstein, Director of GTI-Austria
Claude Marcault
Kerjean's secretary
Jacques Maury
Jack Sleiter, director of GTI
Jacqueline Doyen
Arlène Robert
Marc Eyraud
Sylvestre
Jean Claudio
Vittorio Orta, Director of GTI-Italy
Anthony Stuart
Accuser
Hans Verner
Kurt von Schroeder
Edward Marcus
GTI controller
Pierre Londiche
French interpreter in court
Camille Clavel
Bastien Kerjean
Edmond Bernard
Ralph von Lübeck
Frédérique Meininger
Concierge
François Viaur
Hotel receptionist
Marie-Pierre Casey
Madame Benoît-Lambert's maid
Jacques David
Police commissioner
Marc Fayolle
Enthusiastic reader
Yaseen Khan
Suta Burishawa
Roger Comte
Waiter at the brasserie
Marie-Christine Rolland
Secretary of the Walter agency
Yvonne Dany
Germaine Guérande (uncredited)
Rachid Ferrache
Éric Bronsky (uncredited)
Sacha Lavin
Madame Bayen (uncredited)
Fabienne Mai
Madame Holstein (uncredited)
Bernard Tachl
The follower (uncredited)