Neutron, a wrestler/superhero, investigates a series of murders at a sanitarium.
| Actor | Role |
|---|---|
 Wolf RuvinskisNeutron / Carlos Marquez | Neutron / Carlos Marquez |
 Gina RomandMarga | Marga |
 Rodolfo LandaInspector Rivas | Inspector Rivas |
| JJesús SalinasChucho | Chucho |
 José GálvezDr. Van Nielsen | Dr. Van Nielsen |
 Rita MacedoRebecca Núñez | Rebecca Núñez |
 Rubén RojoOswaldo | Oswaldo |
 Alberto MariscalCaptain Julio Fuentes | Captain Julio Fuentes |
| GGraciela LaraBerta | Berta |
 Nathanael LeónGaston | Gaston |
 Guillermo OreaNot listed | Not listed |
 Antonio RaxelNot listed | Not listed |
| GGuillermo HernándezLobo Negro | Lobo Negro |
 Julián de MericheSergio Romanov | Sergio Romanov |