Hopelessly trapped in its late-'60s look, Rosemary's Baby is nonetheless a watershed movie in the horror genre. It takes an eternity to get moving, sure, but once this story of Mia Farrow's possessed belly gets moving, watch out, for there's no stopping the horror, the horror. The faces of cinema legend (Ruth Gordon, Ralph Bellamy) dot the movie throughout, but it's the smarmy John Cassavetes who steals the show, beating out even Farrow as the ultimate soft-spoken housewife who gets caught up in a world of hell. Er, literally.