L'uccello dalle piume di cristallo (1970)

A newspaper reporter and a retired, blind journalist try to solve a series of killings connected to a pharmaceutical company's experimental, top-secret research projects and in so doing, both become targets of the killer.

A musician is stalked by an unknown killer who's blackmailing him for an accidential killing of another stalker. But is everything what it appears to be?

After witnessing the murder of a famous psychic, a musician teams up with a feisty reporter to find the killer while evading attempts on their lives by the unseen assailant bent on keeping a dark secret buried.

An American writer in Rome is stalked by a serial killer bent on harassing him while killing all people associated with his work on his latest book.

An American college student in Rome and his sister in New York investigate a series of killings in both locations where their resident addresses are the domain of two covens of witches.

A young opperata is stalked by a deranged fan bent on killing the people associated with her to claim her for himself.

A young girl, with an amazing ability to communicate with insects, is transferred to an exclusive Swiss boarding school, where her unusual capability might help solve a string of murders.

A young man tries to help a teenage European girl whom escaped from a clinic hospital after witnessing the murder of her parents by a serial killer and they try to find the killer before the killer finds them.

A newcomer to a fancy ballet academy gradually comes to realize that the school is a front for something far more sinister and supernatural amidst a series of grisly murders.

An elderly and retired police detective and a young amateur sleuth team up to find a serial killer whom has resumed a killing spree in Turin, Italy after a 17-year hiatus.

A young policewoman slowly goes insane while tracking down an elusive serial rapist/killer through Italy when she herself becomes a victim of the brutal man's obsession.

A Rome policewoman teams up with a British Interpol agent to find a crafty serial killer whom plays a taunting game of cat-and-mouse with the police by abducting and killing young women and showing it over an Internet web cam.