Anthony Franciosa ( Anthony Franciosa )

Peter Neal

John Saxon ( John Saxon )

Bullmer

Daria Nicolodi ( Daria Nicolodi )

Anne

Giuliano Gemma ( Giuliano Gemma )

Detective Germani

Christian Borromeo ( Christian Borromeo )

Gianni

Mirella D'Angelo ( Mirella D'Angelo )

Tilde

Veronica Lario ( Veronica Lario )

Jane McKerrow

Ania Pieroni ( Ania Pieroni )

Elsa Manni

Eva Robin's ( Eva Robin's )

Girl on Beach

Carola Stagnaro ( Carola Stagnaro )

Detective Altieri

John Steiner ( John Steiner )

Christiano Berti

Lara Wendel ( Lara Wendel )

Maria Alboretto

Isabella Amadeo ( Isabella Amadeo )

Bullmer's secretary

Mirella Banti ( Mirella Banti )

Marion

Ennio Girolami ( Enio Girolami )

Department Store Manager (as Enio Girolami)

Monica Maisani ( Monica Maisani )

Marino Masé ( Marino Masé )

John

Fulvio Mingozzi ( Fulvio Mingozzi )

Alboretto, the porter

Giampaolo Saccarola ( Giampaolo Saccarola )

Coroner (as Gianpaolo Saccarola)

Ippolita Santarelli ( Ippolita Santarelli )

Prostitute

Francesca Viscardi ( Francesca Viscardi )

Dario Argento ( Dario Argento )

Narrator (Italian version) / Murderer's Hands (voice) (uncredited)

Lamberto Bava ( Lamberto Bava )

Elevator Repairman #1 (uncredited)

Michele Soavi ( Michele Soavi )

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