Dario Argento's giallo masterpiece starring Jessica Harper.
A tale of witches at a famous German ballet school doesn't necessarily sound like it would be fodder for one of the most memorable horror films of all time, but in Argento's hands he weaves a straightforward tale of an American dancer, Suzy (Jessica Harper), who is thrust into a world that she can't quite comprehend, into an hallucinatory nightmare. Fellow students begin to get killed all around her and in trying to figure out why she begins to uncover rumors that a coven of witches actually run the ballet school and they are in a pact with the devil. She begins to loose her grip on reality and as she plummets into experiencing first-hand the demonic powers of black magik, Argento places his viewers into Suzy's fragile psyche to push us all around the bend.
With a luscious photographic palate not seen since the death of Technicolor and one of the most memorable scores in horror film history (thanks to Goblin) Argento was able to surpass even the best of moments from his previous classic giallo films (Deep Red, The Bird With The Crystal Plumage). Add a slew of great gore effects (a knife plunging repeatedly into a beating heart is just the first) and you have a film who's tag line actually lives up to its hype: "The only thing more terrifying than the last 12 minutes of this film are the first 92."