A widower's young son leads the police to a killer of sinners in Mexico City.
| Directing | Harry Horner | Director |
| Directing | Rafael Portillo | Director |
| Writing | Robert Presnell Jr. | Screenplay |
| Writing | Leo Townsend | Screenplay |
| Production | Leonard Goldstein | Producer |
| Sound | Raúl Lavista | Original Music Composer |
| Editing | George Crone | Editor |
| Editing | George A. Gittens | Editor |
| Writing | Georges Simenon | Novel |
| Production | Mildred Gusse | Casting |
| Art | Gunther Gerszo | Art Direction |
| Costume & Make-Up | Sara Mateos | Makeup Artist |
| Costume & Make-Up | Sara Maza | Hairdresser |
| Production | Ricardo Beltri | Unit Manager |
| Production | John Burch | Production Manager |
| Directing | John Burch | Assistant Director |
| Directing | Julio Cahero | Assistant Director |
| Sound | Jesús González Gancy | Sound |
| Sound | Galdino R. Samperio | Sound |
| Camera | Manuel Gómez Urquiza | Camera Operator |
| Camera | Leobardo Sánchez | Assistant Camera |
| Directing | Icaro Cisneros | Script Supervisor |
