Patrick Dewaere

~ as ~

Paul Kerjean

Michel Auclair

~ as ~

Michel Saint-Claude, director of GTI-Europe

Caroline Cellier

~ as ~

Hélène Kerjean

Charles Denner

~ as ~

Walter, private detective

Anny Duperey

~ as ~

Laura Weber, JBL's mistress

Jeanne Moreau

~ as ~

Madame Benoît-Lambert

Mel Ferrer

~ as ~

Cornelius A. Woaegen, president of GTI

Jean-Laurent Cochet

~ as ~

Serge Hartmann, director of La Tribune

Fernand Ledoux

~ as ~

Mr. Guérande

André Falcon

~ as ~

Pierre Bayen, editor-in-chief