Waldemar Daninsky comes to swinging seventies' London, seeking a cure to his malady. Unfortunately, he meets Dr. Jekyll who injects him with a serum that turns him into the lascivious killer Mr. Hyde. In his top hat and black cloak, Hyde haunts the fleshpots of Soho, while two gorgeous women fight for possession of his wolfman soul...
| Actor | Role |
|---|---|
 Paul NaschyWaldemar Daninsky / Wolfman / Mr. Hyde | Waldemar Daninsky / Wolfman / Mr. Hyde |
 Shirley CorriganJustine | Justine |
 Jack TaylorDr. Henry Jekyll | Dr. Henry Jekyll |
 Mirta MillerSandra | Sandra |
 José MarcoImre Kosta | Imre Kosta |
 Luis InduniOtvos | Otvos |
| BBarta BarriGyogyo, the inn-keeper | Gyogyo, the inn-keeper |
| LLuis GasparThurko, Otvos's thug | Thurko, Otvos's thug |
| EElsa ZabalaUswika Bathory | Uswika Bathory |
| LLucy TillerWhore | Whore |
 Montserrat JulióAgatha (uncredited) | Agatha (uncredited) |
| MMarisol DelgadoNurse / Victim (uncredited) | Nurse / Victim (uncredited) |
| MMaría Luisa TovarStreetwalker / Victim (uncredited) | Streetwalker / Victim (uncredited) |
 Heinrich StarhembergParty Guest (uncredited) | Party Guest (uncredited) |
 Jorge VicoNot listed | Not listed |
| AAdolfo Thous(as Adolfo Tohus) | (as Adolfo Tohus) |
 Simón RamírezWaldemar Daninsky (voice) (uncredited) | Waldemar Daninsky (voice) (uncredited) |