Starring: Suzy Kendall, Tina Aumont, Luc Merenda, John Richardson

With a masked killer picking off college students in Perugia, Italy, four co-eds head to a lavish countryside estate to escape the danger. Unfortunately for them, the killer has followed them there, turning their getaway villa into a slaughterhouse. Widely considered to be one of the first slasher films, this excellent and quite lurid giallo from the great Sergio Martino, celebrating its 50th anniversary this year, is a masterclass in both white-knuckle tension and tightly orchestrated murder set-pieces. —Matt Barone