Don Plascencio has a collection of men he uses like radio stations: in a routine aural examination each man plays a different musical piece instead of the usual heartbeat.
| Actor | Role |
|---|---|
| MMiguel CouturierAuscultator | Auscultator |
| JJoaquín ChabléMain Auscultator | Main Auscultator |
| IIsmael A. EscobarNot listed | Not listed |
 Alfonso ViruésNot listed | Not listed |
| AAaron De la RosaNot listed | Not listed |
| MMisael GarcíaNot listed | Not listed |
| RRafael GonzálesNot listed | Not listed |
| TToño GonzálesNot listed | Not listed |
| HHumberto MacíasNot listed | Not listed |
| EEsteban Mtz.Not listed | Not listed |
| RRaúl HerreraNot listed | Not listed |
| DDiego TenorioNot listed | Not listed |
| JJosé AdemarNot listed | Not listed |
| IIsrael G. VillafánNot listed | Not listed |
| JJaime AparicioNot listed | Not listed |