Onder andere met: Jessica Harper (Suzy Bannion), Stefania Casini (Sara), Flavio Bucci (Daniel), Miguel Bosé (Mark), Barbara Magnolfi (Olga), Susanna Javicoli (Sonia), Eva Axén (Pat Hingle), Rudolf Schündler (Prof. Milius), Udo Kier (Dr. Frank Mandel), Renato Scarpa (Prof. Verdegast), Alida Valli (Miss Tanner), Joan Bennett (Madame Blanc), Margherita Horowitz (Teacher), Jacopo Mariani (Albert), Giuseppe Transocchi (Pavlo), Renata Zamengo (Caroline), Claudia Zaccari (Dancer), Diana Ferrara (Dancer), Dario Argento (Narrator (voice))