Maigret investigates in Concarneau where the passage of a yellow dog accompanies a series of murders, sowing terror in the population. The police seem helpless. It must be said that it has no significant evidence.
Abel Tarride
as le commissaire Maigret
Rosine Deréan
as Emma
Rolla Norman
as Léon
Robert Le Vigan
as le docteur Ernest Michoux
Jacques Henley
as le Pommeret
Anthony Gildès
as Le pharmacien
Robert Lepers
as L'inspecteur
Jean Gobet
as Le voyageur de commerce
Paul Azaïs
as Le marin
Paul Clerget
as Le maire
Fred Marche
as Servières
Jane Loury
as L'hôtelière
