Trailer
Images
 | Albert Préjean as Le commissaire Jules Maigret |
 | Suzy Prim as Émilie Petersen |
 | Denise Grey as Madame Van Bell |
 | Jacques Baumer as Arthur Donge |
 | Florelle as Charlotte Donge |
 | André Gabriello as L'inspecteur Lucas |
 | Fernand Charpin as Le juge d'instruction |
 | Jean Marchat as Fred Petersen |
 | Gina Manès as Ginette, la femme de service |
 | René Génin as Ramuel |
 | Denise Bosc as Hélène Donnegan, la secrétaire des Petersen |
 | Gabrielle Fontan as Rosalie, la bonne de Fualdès |
 | Jeanne Manet as La chanteuse du cabaret |
 | Georges Chamarat as Dussart, le veilleur de nuit du Majestic |
 | Marcel Lévesque as Le directeur de l'Agence Internationale |
 | Jean-Jacques Delbo as Enrico Fualdès |
| Rognoni as Le directeur du Majestic |
| Robert Demorget as Le petit Teddy Petersen |
 | Serge Berry as Le remplaçant de Donge (uncredited) |
| Jean-Marie Boyer as Un commis de cuisine (uncredited) |
 | Jean Clarieux as Le chauffeur de taxi (uncredited) |
| Marius David as (uncredited) |
| Charlotte Ecard as La concierge de Maigret (uncredited) |
 | Richard Francœur as Delormel, l'employé de banque (uncredited) |
 | Édouard Francomme as (uncredited) |
| Louis Frère as Un cuisinier (uncredited) |
 | Émile Genevois as Le jeune cuistot (uncredited) |
 | Marcel Melrac as Un inspecteur (uncredited) |
 | Julienne Paroli as Madame Marcelle, employée aux cuisines (uncredited) |
 | Maurice Salabert as Un inspecteur (uncredited) |
 | Henri Vilbert as Le chef cuisinier (uncredited) |
| Marie-José as La chanteuse (voice) (uncredited) |
| Directing | |
| Richard Pottier | Director |
Writing | |
| Charles Spaak | Dialogue |
| Charles Spaak | Adaptation |
| Georges Simenon | Novel |
