Jessica Harper character Suzy Bannion
Stefania Casini character Sara
Flavio Bucci character Daniel
Miguel Bosé character Mark
Barbara Magnolfi character Olga
Susanna Javicoli character Sonia
Eva Axén character Pat Hingle
Rudolf Schündler character Prof. Milius
Udo Kier character Dr. Frank Mandel
Alida Valli character Miss Tanner
Joan Bennett character Madame Blanc
Margherita Horowitz character Teacher (uncredited)
Jacopo Mariani character Albert (uncredited)
Fulvio Mingozzi character Taxi Driver (uncredited)
Franca Scagnetti character Cook (uncredited)
Renato Scarpa character Prof. Verdegast (uncredited)
Serafina Scorceletti character 2nd Cook (uncredited)
Giuseppe Transocchi character Pavlo (uncredited)
Renata Zamengo character Caroline (uncredited)
Alessandra Capozzi character Dancer (uncredited)
Salvatore Capozzi character Dancer (uncredited)
Diana Ferrara character Dancer (uncredited)
Cristina Latini character Dancer (uncredited)
Alfredo Raino character Dancer (uncredited)
Claudia Zaccari character Dancer (uncredited)
Dario Argento character Narrator (voice) (uncredited)
Giovanni di Bernardo character Police Inspector (uncredited)
Daria Nicolodi character Woman at Airport (uncredited)
Marina Pierro character Figurant (uncredited)
Lela Svasta character Helena Markos (uncredited)
