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

José Greci as Arlette

Antonio Battistella as Dr. Pasquier

Antonella Della Porta as

Tino Bianchi as

Gianluigi Crescenzi as

Giulio Maculani as

Renato Lupi as

Diego Michelotti as

Gabriella Giorgelli as

Donatella Della Nora as

Marisa Traversi as

Elena Demerik as

Daniel Ollie as Philippe