

A masked killer stalks an institution for mentally disturbed rich women.
Acting
Kinski's unhinged doctor energy steals every scene he's in.
Production
Gothic hotel-asylum location is gloriously wrong for a medical facility.
Practical Effects
Killer's crossbow method: impractical, memorable, very giallo.

Director
Fernando Di Leo
Trivia, insights & behind the scenes
Fernando Di Leo later disowned this film, preferring his poliziotteschi crime thrillers. The feeling was mutual.
This is peak 'psycho-biddy' giallo: beautiful women in institutions, sexualized madness, and zero medical accuracy. Italians loved locking attractive actresses in creepy villas.