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
MaĂźtre Laignan
Le Cloaguen
Le grand patron
Amadieu
Le docteur Pierre
La soeur de Le Cloaguen
Madame Le Cloaguen
(uncredited)
Le clerc (uncredited)
Le coursier (uncredited)
Jacques (uncredited)
Madame Cognet (uncredited)
Le peintre (uncredited)
(uncredited)
(uncredited)
Marie, la bonne (uncredited)
Un inspecteur (uncredited)
Le garçon du buffet (uncredited)
Madame Bertaud (uncredited)
Eliane (uncredited)
Director