Maigret is about to leave for the holidays but a colleague asks him for help in investigating the mysterious murder of a stripper and a noblewoman, both of which took place in Pigalle.

Gino Cervi
as Commissaire Maigret

Lila Kedrova
as Rose

Raymond Pellegrin
as Fred Alfonsi

Alfred Adam
as Ispettore Lognon

Christian Barbier
as Ispettore Torrence

Riccardo Garrone
as Lapointe

Claudio Biava
as Janvier

Enzo Cerusico
as Albert

Armando Bandini
as Sauterelle

Mario Feliciani
as Direttore polizia