Dr. Henry Jekyll experiments with scientific means of revealing the hidden, dark side of man and releases a murderer from within himself.
| Actor | Role |
|---|---|
 Mario SofficiDr. Jekyll / Mr. Hyde | Dr. Jekyll / Mr. Hyde |
 Ana María CampoySara | Sara |
 Olga ZubarryLola | Lola |
 José CibriánDr. Anderson | Dr. Anderson |
 Federico MansillaDr. Dayon | Dr. Dayon |
 Panchito LombardEnriquito | Enriquito |
| AArsenio PerdigueroCarmelo | Carmelo |
 Rafael FrontauraActor | Actor |
| JJesús PampínPolicía | Policía |
 Rodolfo CrespiNot listed | Not listed |
 Gloria FerrandizNot listed | Not listed |
| MMartha AtocheNot listed | Not listed |