Directed by Bob Clark | 98 mins | 1974
Disturbing phone calls and a lethally minded intruder drain the cheer from a sorority Christmas party in this seminal Canadian slasher—a lodestar for “Halloween” (1978) and indeed the entire subgenre. Now widely acknowledged as one of the best horror films ever made, this bloody, low-budget riff on a sixties urban legend feels just as shocking, and just as innovative, 50 years on from its release.