Directed by:- Dario Argento
- Dario Argento
- Franco Ferrini
- Jennifer Connelly ... Jennifer Corvino
- Daria Nicolodi ... Frau Brückner
- Dalila Di Lazzaro ... Headmistress
- Patrick Bauchau ... Inspector Rudolf Geiger
- Donald Pleasence ... Professor John McGregor
- Fiore Argento ... Vera Brandt
- Federica Mastroianni ... Sophie
- Fiorenza Tessari ... Gisela Sulzer
- Mario Donatone ... Morris Shapiro
- Francesca Ottaviani ... Nurse
- Michele Soavi ... Kurt, Geiger's Assistant
- Franco Trevisi ... Real Estate Agent
- Fausta Avelli ... Schoolgirl
- Marta Biuso ... Schoolgirl
- Sophie Bourchier ... Schoolgirl
- Paola Gropper ... Schoolgirl
- Ninke Hielkema ... Schoolgirl
- Mitzy Orsini ... Schoolgirl
- Geraldine Thomas ... Schoolgirl
- Tanga ... Inga
- Nick Alexander ... Real Estate Agent (voice: English version)
- Dario Argento ... Narrator (Italian version) (voice)
- Franca Berdini ... Teacher
- Kaspar Capparoni ... Karl, Sophie's Boyfriend
- Alberto Cracco ... UBS Bank Teller
- Carolyn De Fonseca ... Frau Brückner (voice: English version)
- Antonio Maimone ... EEG Doctor
- Davide Marotta ... Patua, Bruckner Child
- Fulvio Mingozzi ... Mr. Sulzer
- Marisa Simonetti ... Schoolgirl
