A journalist investigates several crimes, one of which involves the well-known riddle of the "closed room".
| Actor | Role |
|---|---|
 Santiago Gómez CouNot listed | Not listed |
 Herminia FrancoNot listed | Not listed |
 Tito AlonsoNot listed | Not listed |
 Floren DelbeneNot listed | Not listed |
 Ilde PirovanoNot listed | Not listed |
 Agustín OrrequiaNot listed | Not listed |
 Cirilo EtulainNot listed | Not listed |
 Julia SandovalNot listed | Not listed |
 María Esther BuschiazzoNot listed | Not listed |
 Adolfo StrayNot listed | Not listed |
 Margarita BurkeNot listed | Not listed |
| DDiego MarcoteNot listed | Not listed |
 Nathán PinzónNot listed | Not listed |
 Jorge VilloldoNot listed | Not listed |
| ÁÁngel WalkNot listed | Not listed |
 Pedro FioritoNot listed | Not listed |
 Arturo ArcariJefe de redacción | Jefe de redacción |
 Roberto BordoniFiscal | Fiscal |
| LLucio DevalPeriodista en redaccián | Periodista en redaccián |
| AAlfonso Ferrari AmoresNot listed | Not listed |
| JJesús PampínNot listed | Not listed |
| EEnrique de PedroNot listed | Not listed |