Hercules battles an evil sorceress who turns men into werewolves. The mythic duo returns in Prisoner of Evil, where a sorceress seduces Herc and transforms him into a mindless beast. Italian horror master Antonio Margheriti directed this installment of the Hercules legend, a blend of sword-and-sandal fantasy and horror.
| Actor | Role |
|---|---|
| RReg ParkUrsus | Ursus |
 Mireille GranelliAmiko | Amiko |
 Ettore ManniIlo | Ilo |
 Furio MeniconiZereteli | Zereteli |
 María Teresa OrsiniKato | Kato |
 Lilly MantovaniSlave | Slave |
 Nino FuscagniMiko | Miko |
 Giulio MaculaniVaros | Varos |
 Ugo CarboniNot listed | Not listed |
 Claudio ScarchilliLava | Lava |
| PPiero PastoreAmko | Amko |
| GGaetano QuartararoNot listed | Not listed |
 Claudio RuffiniFrido | Frido |