"Terror Beyond Belief!"
A razor-wielding serial killer is on the loose, murdering those around Peter Neal, an American mystery author in Italy to promote his newest novel.
Dario ArgentoDirector
Peter Neal
Bullmer
Anne
Detective Germani
Gianni
Tilde
Jane McKerrow
Elsa Manni
Girl on Beach
Detective Altieri
Christiano Berti
Maria Alboretto
Bullmer's secretary
Marion
Department Store Manager (as Enio Girolami)
John
Alboretto, the porter
Coroner (as Gianpaolo Saccarola)
Prostitute
Narrator (Italian version) / Murderer's Hands (voice) (uncredited)
Elevator Repairman #1 (uncredited)
Maria's Boyfriend / Man Walking with Girl on Beach (uncredited)
