Lino Ventura as Sébastien Grenier

Michel Piccoli as Jean-Paul Chance

Bruno Cremer as Alain Richard

Bernard Fresson as Henri Marchand

Marc Mazza as Ramos Bavila

Roger Jendly as Commissioner Lohmann

Heinz Bennent as Meyer

Krystyna Janda as Anna Gretz

Beate Kopp as Grenier's secretary

Christian Baltauss as Librarian

Kurt Bigger as Alfred Zimmer

Jean-Paul Franky as Rudy 'la blonde'

Yves Boisset as Richard's assistant

Daniel Plancherel as Inspector Vogel

Philippe Brizard as Grenier employee

Max Moor as Dieter Krauss

Pierre Boffety as Postman

Jean Reney as

Robert Dalban as Narrator (voice) (uncredited)