Anthony Perkins as Johnny Parsons

Jean-Claude Brialy as Jean-Philippe

Renato Salvatori as François

Pascale Audret as Agnès

Jacques Monod as Commissioner

Marie Déa as Madame Winter

Horst Janson as Mac

Fernand Ledoux as Prosecutor

Maurice Chevit as Inspector

Anne Tonietti as Christine Prévost

Élina Labourdette as Simone Darbon

Henri Vilbert as Juror

Lou Bennett as Lou Bennett and Kenny Clark Jazz Combo

Paul Amiot as Man

Teddy Bilis as Juror

Charles Blavette as

Claude Cerval as Plouzenec

Janine Darcey as Chantal

Michel Dacquin as

Germaine Delbat as Widow Prévost

Gilberte Géniat as Lady from the jury

Gilbert Gil as Inspector Portal

Sophie Grimaldi as Brigitte

Camille Guérini as Judge Noblet

Robert Le Béal as

Sophie Leclair as

Diane Lepvrier as Marianne

Héléna Manson as Lady from the jury

Pierre Mirat as Juror

Maurice Nasil as

Jean Ozenne as Art lover

Marcel Pérès as Juror

Agnès Rivière as Marie

Robert Rollis as

Christian Bagot as

René Pascal as

Michel Bellamari as

Jack Bérard as

Charles Bondi as University roommate of J. Parsons

Charles Bouillaud as Inspector

Jean-Jacques Bourgeois as

Gabriel Gobin as Albert, concierge of the Law Court

Horst Janson as

Henri Lambert as Inspector

Mae Mercer as

Bernard Musson as

Claude Salez as

Henri Garcin as (uncredited)