Director David Fincher's involving thriller tells the true story of the Zodiac Killer, a serial murderer who terrorized Northern California in the late '60s. As the killer leaves behind clues to taunt the authorities, four men-Bay Area cops Dave Toschi (Mark Ruffalo) and William Armstrong (Anthony Edwards), crime reporter Paul Avery (Robert Downey, Jr.), and cartoonist Robert Graysmith (Jake Gyllenhaal), whose book served as the film's inspiration-become obsessed with bringing him to justice. Brian Cox co-stars. Director's cut; 162 min. Widescreen; Soundtrack: English. Two-disc set.