Lino Ventura
— Sébastien Grenier
Michel Piccoli
— Jean-Paul Chance
Bruno Cremer
— Alain Richard
Bernard Fresson
— Henri Marchand
Marc Mazza
— Ramos Bavila
Roger Jendly
— Commissioner Lohmann
Heinz Bennent
— Meyer
Krystyna Janda
— Anna Gretz
Beate Kopp
— Grenier's secretary
Christian Baltauss
— Librarian
Kurt Bigger
— Alfred Zimmer
Jean-Paul Franky
— Rudy 'la blonde'
Yves Boisset
— Richard's assistant
Daniel Plancherel
— Inspector Vogel
Philippe Brizard
— Grenier employee
Max Moor
— Dieter Krauss
Pierre Boffety
— Postman
Jean Reney
Robert Dalban
— Narrator (voice) (uncredited)