Anthony Perkins

Johnny Parsons

Jean-Claude Brialy

Jean-Philippe

Renato Salvatori

François

Pascale Audret

Agnès

Jacques Monod

Commissioner

Marie Déa

Madame Winter

Horst Janson

Mac

Fernand Ledoux

Prosecutor

Maurice Chevit

Inspector

Anne Tonietti

Christine Prévost

Élina Labourdette

Simone Darbon

Henri Vilbert

Juror

Lou Bennett

Lou Bennett and Kenny Clark Jazz Combo

Paul Amiot

Man

Teddy Bilis

Juror

Charles Blavette

Claude Cerval

Plouzenec

Janine Darcey

Chantal

Michel Dacquin

Germaine Delbat

Widow Prévost

Gilberte Géniat

Lady from the jury

Gilbert Gil

Inspector Portal

Sophie Grimaldi

Brigitte

Camille Guérini

Judge Noblet

Robert Le Béal

Sophie Leclair

Diane Lepvrier

Marianne

Héléna Manson

Lady from the jury

Pierre Mirat

Juror

Maurice Nasil

Jean Ozenne

Art lover

Marcel Pérès

Juror

Agnès Rivière

Marie

Robert Rollis

Christian Bagot

René Pascal

Michel Bellamari

Jack Bérard

Charles Bondi

University roommate of J. Parsons

Charles Bouillaud

Inspector

Jean-Jacques Bourgeois

Gabriel Gobin

Albert, concierge of the Law Court

Horst Janson

Henri Lambert

Inspector

Mae Mercer

Bernard Musson

Claude Salez

Henri Garcin

(uncredited)