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

Hans Verner

Kurt von Schroeder

Pierre Londiche

French interpreter in court

Camille Clavel

Bastien Kerjean

Frédérique Meininger

Concierge

François Viaur

Hotel receptionist

Marie-Pierre Casey

Madame Benoît-Lambert's maid

Marc Fayolle

Enthusiastic reader

Yaseen Khan

Suta Burishawa

Yvonne Dany

Germaine Guérande (uncredited)

Rachid Ferrache

Éric Bronsky (uncredited)