Paul Kerjean
Michel Saint-Claude, director of GTI-Europe
Hélène Kerjean
Walter, private detective
Laura Weber, JBL's mistress
Madame Benoît-Lambert
Cornelius A. Woaegen, president of GTI
Serge Hartmann, director of La Tribune
Mr. Guérande
Pierre Bayen, editor-in-chief
Dr. Gerhard Kramer
Madame Bronsky
Fred Great
Jacques Benoît-Lambert, aka 'JBL'
Bronsky, then Stan Hankins, the informant
Joachim Holstein, Director of GTI-Austria
Kerjean's secretary
Jack Sleiter, director of GTI
Arlène Robert
Sylvestre
Vittorio Orta, Director of GTI-Italy
Accuser
Kurt von Schroeder
GTI controller
French interpreter in court
Bastien Kerjean
Ralph von Lübeck
Concierge
Hotel receptionist
Madame Benoît-Lambert's maid
Police commissioner
Enthusiastic reader
Suta Burishawa
Waiter at the brasserie
Secretary of the Walter agency
Germaine Guérande (uncredited)
Éric Bronsky (uncredited)
Madame Bayen (uncredited)
Madame Holstein (uncredited)
The follower (uncredited)