Jessica Harper as Suzy Bannion

Stefania Casini as Sara

Flavio Bucci as Daniel

Miguel Bosé as Mark

Barbara Magnolfi as Olga

Susanna Javicoli as Sonia

Eva Axén as Pat Hingle

Rudolf Schündler as Prof. Milius

Udo Kier as Dr. Frank Mandel

Alida Valli as Miss Tanner

Joan Bennett as Madame Blanc

Margherita Horowitz as Teacher

Jacopo Mariani as Albert

Fulvio Mingozzi as Taxi Driver

Franca Scagnetti as Cook

Renato Scarpa as Prof. Verdegast

Serafina Scorceletti as 2nd Cook

Giuseppe Transocchi as Pavlo

Renata Zamengo as Caroline

Alessandra Capozzi as Dancer

Salvatore Capozzi as Dancer

Diana Ferrara as Dancer

Cristina Latini as Dancer

Alfredo Raino as Dancer

Claudia Zaccari as Dancer

Dario Argento as Narrator (voice) (uncredited)

Daria Nicolodi as Woman at Airport (uncredited)

Marina Pierro as Figurant (uncredited)