 | Jennifer Connelly als Jennifer Corvino |
 | Daria Nicolodi als Frau Brückner |
 | Fiore Argento als Vera Brandt |
 | Federica Mastroianni als Sophie |
 | Fiorenza Tessari als Gisela Sulzer |
 | Dalila Di Lazzaro als Headmistress |
 | Patrick Bauchau als Inspector Rudolf Geiger |
 | Donald Pleasence als Professor John McGregor |
 | Alberto Cracco als UBS Bank Teller |
 | Kaspar Capparoni als Karl, Sophie's Boyfriend |
 | Mario Donatone als Morris Shapiro |
 | Antonio Maimone als EEG Doctor |
 | Davide Marotta als Patau (Bruckner Son) |
 | Fulvio Mingozzi als Mr. Sulzer |
 | Francesca Ottaviani als Nurse |
 | Michele Soavi als Kurt, Geiger's Assistant |
 | Franco Trevisi als Real Estate Agent |
 | Fausta Avelli als Schoolgirl |
| Franca Berdini als Teacher |
| Marta Biuso als Schoolgirl |
| Marisa Simonetti als Schoolgirl |
| Geraldine Thomas als Schoolgirl |
| Tanga als Inga |
 | Stefania Possamai als Teacher (uncredited) |
| Romano Albani | Director of Photography |
| Giorgio Armani | Costume Design |
| Dario Argento | Screenplay |
| Dario Argento | Producer |
| Franco Ferrini | Screenplay |
| Dario Argento | Director |
| Franco Fraticelli | Editor |
| Luigi Cozzi | Special Effects |
| Sergio Stivaletti | Makeup Effects |
| Simon Boswell | Original Music Composer |
| Marcel Just | Unit Manager |
| Franco Ferrini | Story |
| Dario Argento | Story |
| Angelo Iacono | Executive Producer |
| Barbara Morosetti | Makeup Artist |
| Piero Bozza | Music Editor |
| Angelo Iacono | Production Manager |
| Bettina Graebe | Second Assistant Director |
| Marina Malavasi | Costume Design |
| Pierantonio Mecacci | Makeup Artist |
| Patrizia Corridoni | Hairstylist |
| Patrizia Massaia | Costume Design |
| Antonio Corridori | Special Effects |
| Michele Soavi | First Assistant Director |
| Cesare Jacolucci | Production Manager |
| Danilo Bollettini | Special Effects |
| Nello Giorgetti | Production Designer |
| Maurizio Garrone | Animal Coordinator |
| Maurizio Garrone | Production Designer |
| Luciano Spadoni | Production Designer |
| Umberto Turco | Production Designer |
| Nick Alexander | Sound Effects Editor |
| Massimo Anzellotti | Sound Effects Editor |
| Franco Fraticelli | Supervising Sound Editor |
| Claudio Simonetti | Songs |
| Andy Sex Gang | Songs |
| Fabio Pignatelli | Songs |
| Iron Maiden | Songs |
| Claudio Simonetti | Original Music Composer |
