Patients and those working in an isolated mental hospitals are murdered, one by one, by a madman lurking in the corridors
| Directing | Elio Scardamaglia | Director |
| Writing | Luciano Martino | Screenplay |
| Writing | Ernesto Gastaldi | Screenplay |
| Production | Elio Scardamaglia | Producer |
| Directing | Lionello De Felice | Director |
| Writing | Robert Williams | Novel |
| Directing | Roberto Pariante | Assistant Director |
| Camera | Marcello Masciocchi | Director of Photography |
| Editing | Alberto Gallitti | Editor |
| Costume & Make-Up | Massimo Giustini | Makeup Artist |
| Production | Piero Lazzari | Production Manager |
| Sound | Bernardino Fronzetti | Sound Recordist |
