Anthony Franciosa

Character: Peter Neal

John Saxon

Character: Bullmer

Daria Nicolodi

Character: Anne

Giuliano Gemma

Character: Detective Germani

Christian Borromeo

Character: Gianni

Mirella D'Angelo

Character: Tilde

Veronica Lario

Character: Jane McKerrow

Ania Pieroni

Character: Elsa Manni

Eva Robin's

Character: Girl on Beach

Carola Stagnaro

Character: Detective Altieri

John Steiner

Character: Christiano Berti

Lara Wendel

Character: Maria Alboretto

Isabella Amadeo

Character: Bullmer's secretary

Mirella Banti

Character: Marion

Ennio Girolami

Character: Department Store Manager

Monica Maisani

Character:

Marino Masé

Character: John

Fulvio Mingozzi

Character: Alboretto

Giampaolo Saccarola

Character: Coroner

Ippolita Santarelli

Character: Prostitute

Francesca Viscardi

Character:

Dario Argento

Character: Narrator / Murderer's Hands (voice) (uncredited)

Lamberto Bava

Character: Elevator Repairman #1 (uncredited)

Michele Soavi

Character: Maria's Boyfriend / Man with Girl on Beach (uncredited)