Ricardo Núñez
Director

José María Caffarel
Comisario Dupuy Ángel del Pozo
Simenón Mary Santpere
Oscar J. Bennett Liliane Brousse
Bettina Carlos Casaravilla
Ivan Sharovski Lily Vincenti
Mrs. Brown Manuel de Melero
Victor Burke María Dolores Díaz
Compañía Emilio Sancho
León Consuelo Vives
Dependienta de la bombonería Pilar Montejo
Esposa de Ivan Carlos Ronda
Director del hotel

Luisa Maria Linares
Writer Juan Carlos Sabaté
Screenplay Noel Clarasó
Screenplay Augusto Algueró
Music José Torregrosa
Music Federico G. Larraya
Director of Photography Albert Gasset Nicolau
Editor Carlos de la Riva
Sound Engineer Enrique Pons
Sound Assistant Pascual García
Assistant Camera Salvador Gil
Camera Operator Rafael Pérez de Rozas
Still Photographer