A humble bartender has a fantastic and prodigious memory that astonishes everyone who meets him. Driven by this gift, he decides to participate in a television game show. Given the fame he has gained, he decides to go to medical school to help his student friends.
| Actor | Role |
|---|---|
 José Carlos MarroneCristóbal Colón | Cristóbal Colón |
 Juanita MartínezLuz | Luz |
 María ArmandDoña Lucia | Doña Lucia |
 Nelly LáinezSrta. Goyeneche | Srta. Goyeneche |
 José María LanglaisAlfredo Marquez | Alfredo Marquez |
| AAlicia PazAdela | Adela |
| VVíctor TascaNot listed | Not listed |
| PPepe CastroNot listed | Not listed |
| AAntonio ProvitiloAntonio | Antonio |
 Roberto BordoniDr. Lustari, decano | Dr. Lustari, decano |
 Alberto IrízarOficial de policía | Oficial de policía |
| RRicardo de RosasNot listed | Not listed |
| RRoberto RaimundoNot listed | Not listed |
| NNelson PrenatNot listed | Not listed |
| PPancho RomanoNot listed | Not listed |
| HHumberto SelvettiNot listed | Not listed |
| SSusana AndréNot listed | Not listed |
 Orlando MarconiNot listed | Not listed |