Why is this movie Hitchcock’s masterpiece? Because no movie plunges us more deeply into the dizzying heart of erotic obsession. Because in Jimmy Stewart’s fetishtic pursuit of mystery woman Kim Novak–whom he transforms into the image of the dead w oman he loved–Hitchcock created the cinema’s most indelible metaphor for the objectification of desire. Because Stewart, playing a man free-falling into love, responds with a performance so harrowing in its ferocity it must have surprised even himself. Because Novak, that great slinky cat, imbues her double role with a mesmerizing poignance. Because the impeccable, dreamlike images of this ghostly Liebestod are so eerily beautiful they stay in your head forever. And because the older you get, and the m ore times you see it, the more strange, chillingly romantic thriller pierces your heart.