A sadistic count tortures and murders his unfaithful wife and her lover, then removes their hearts from their bodies. Years later, the count remarries and the new wife experiences nightmares and hauntings.
You can now watch Nightmare Castle online on the following streaming providers in the United States.
| Directing | Mario Caiano | Director |
| Production | Carlo Caiano | Producer |
| Camera | Enzo Barboni | Director of Photography |
| Editing | Renato Cinquini | Editor |
| Sound | Ennio Morricone | Original Music Composer |
| Writing | Mario Caiano | Story |
| Writing | Mario Caiano | Screenplay |
| Writing | Mario Caiano | Dialogue |
| Writing | Fabio De Agostini | Story |
| Writing | Fabio De Agostini | Screenplay |
| Writing | Fabio De Agostini | Dialogue |
| Production | Pietro Nofri | Supervising Producer |
| Production | Massimo Tavazzi | Production Designer |
| Art | Massimo Tavazzi | Set Decoration |
| Costume & Make-Up | Mario Giorsi | Costume Designer |
| Costume & Make-Up | Duilio Giustini | Makeup Artist |
| Production | Carlo Caiano | Production Manager |
| Directing | Angelo Sangermano | Assistant Director |
| Sound | Bernardino Fronzetti | Sound Engineer |
| Camera | Mario Mancini | Camera Operator |
| Camera | Ermanno Serto | Still Photographer |
| Sound | Ennio Morricone | Conductor |
| Directing | Priscilla Contardi | Continuity |
| Production | Pietro Nofri | Production Assistant |
