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.
| Directing | Antonio Margheriti | Director |
| Sound | Franco Mannino | Original Music Composer |
| Production | Adelpho Ambrosiano | Producer |
| Writing | Marcello Sartarelli | Screenplay |
| Camera | Gábor Pogány | Director of Photography |
