A succession of television broadcasts has unexpected and terrifying effects on the minds of viewers.
| Actor | Role |
|---|---|
 Richard ConteSteven Jameson | Steven Jameson |
| AAnna StrasbergDra. Margaret Conway | Dra. Margaret Conway |
 Jorge Rivera LópezNot listed | Not listed |
 Eduardo MuñozNot listed | Not listed |
 Eddie PequeninoNot listed | Not listed |
 Ignacio de SoroaNot listed | Not listed |
| ÓÓscar DuoNot listed | Not listed |
 Susana BeltránNot listed | Not listed |
 Aldo BigattiNot listed | Not listed |
| CChely HasperueNot listed | Not listed |
| LLoló PratNot listed | Not listed |
| EEdmundo SandersNot listed | Not listed |
| SSergio VandersNot listed | Not listed |
| SSergio MalbránNot listed | Not listed |
 Gloria PratNot listed | Not listed |
| LLouis BlueNot listed | Not listed |
| MMauricio de FerrariNot listed | Not listed |
| JJusto MartínezNot listed | Not listed |
| RRicardo MoriniNot listed | Not listed |