Exactly two years ago in this paper, I called Chinatown the greatest film of all time. I meant to say: except for The Third Man. Vertiginous expressionism, European accents, kinky intrigue, the Ferris wheel scene, Joseph Cotten, Trevor Howard, the kitty at Orson Welles's feet, ORSON WELLES!!!—just a few highlights from the Carol Reed and Graham Greene masterpiece that yields new pleasures every time you see it. WHAT DO YOU MEAN YOU HAVEN'T SEEN IT? (Grand Illusion, 1403 NE 50th St, 523-3935. 7 and 9 pm, $5—$8.)