Bizarre events keep occurring in an old mansion, and it's soon become obvious that something mysterious is up in the attic.
| Production | Adriano De Micheli | Producer |
| Editing | Alberto Gallitti | Editor |
| Production | Pio Angeletti | Producer |
| Writing | Giovanni Arpino | Novel |
| Sound | Francis Lai | Original Music Composer |
| Directing | Dino Risi | Director |
| Camera | Tonino Delli Colli | Director of Photography |
| Writing | Bernardino Zapponi | Screenplay |
| Writing | Dino Risi | Screenplay |
| Directing | Claudio Risi | Assistant Director |
| Art | Luciano Ricceri | Production Design |
| Art | Luciano Ricceri | Set Decoration |
| Costume & Make-Up | Luciano Ricceri | Costume Design |
| Production | Mario D'Alessio | Production Manager |
| Sound | Christian Gaubert | Music Arranger |
| Production | Fausto Capozzi | Production Secretary |
| Costume & Make-Up | Antonio Randaccio | Assistant Costume Designer |
| Art | Paolo Biagetti | Assistant Production Design |
| Art | Ezio Di Monte | Assistant Production Design |
| Production | Roberto Mezzaroma | Administration |
| Camera | Carlo Tafani | Camera Operator |
| Sound | Vittorio Massi | Sound |
| Costume & Make-Up | Giusy Bovino | Hairstylist |
| Costume & Make-Up | Giulio Natalucci | Makeup Artist |
| Costume & Make-Up | Alfonso Gola | Makeup Artist |
| Editing | Lidia Pascolini | Assistant Editor |
| Editing | Anna Rosa Napoli | Assistant Editor |
| Camera | Huguette Roux | Still Photographer |
| Crew | Maria Ruhle | Unit Publicist |
| Sound | Renato Marinelli | Sound Effects |
| Sound | Romano Checcacci | Sound Mixer |
