
Picpus is a street and a subway stop where a number of murders have been committed. Maigret tries to find the killer.

Maigret

Berthe

Mascouvin

Lucas

Louis Dubief

Maître Laignan

Le Cloaguen

Le grand patron

Amadieu

Le docteur Pierre

La soeur de Le Cloaguen

Madame Le Cloaguen
Le petit employé (uncredited)
(uncredited)

(uncredited)
(uncredited)

Le clerc (uncredited)

Le coursier (uncredited)

(uncredited)

Jacques (uncredited)

Madame Cognet (uncredited)

Le peintre (uncredited)
(uncredited)
(uncredited)

(uncredited)

(uncredited)

Marie, la bonne (uncredited)

Un inspecteur (uncredited)

Le garçon du buffet (uncredited)

Madame Bertaud (uncredited)
La patronne de l'hôtel (uncredited)
Bouffartigues (uncredited)

Eliane (uncredited)
La concierge de Jeanne Dumont (uncredited)