Georges Marchal as Didier Guéret

Françoise Christophe as Alberte Guéret

Nicole Courcel as Léone Fassler

Suzanne Dehelly as Clémence Guéret

Jacques Castelot as Commissioner Lotte

Louis Seigner as Lanzel

Jacques Morel as Van Goffin

René Blancard as Jaltex

Micheline Gary as Charlotte

Pierre Sergeol as Inspector Richard

Olivier Hussenot as Doctor Dufour

Paul Azaïs as Lulu

Viviane Gosset as

Maurice Jacquemont as An inspector

Raymond Raynal as An inspector

Jean-Jacques Lécot as

Raphaël Patorni as An inspector

Annie Noël as Anna

Jean Gobin as

Margo Lion as Mrs. Platz, the patroness of the cafe

Jacques Dynam as Inspector Sennac

Robert Allan as (uncredited)

Jean-Marie Bon as (uncredited)

Daniel Ceccaldi as Fred, Charlotte's friend (uncredited)

Henri Coutet as (uncredited)

Hubert Deschamps as (uncredited)

Maurice Dorléac as (uncredited)

Wanda Kérien as (uncredited)

Denise Kerny as (uncredited)

Robert Moor as (uncredited)

Albert Rémy as Picard, an employee of the garage (uncredited)

Georges Sellier as The Medical Examiner (uncredited)