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