A 2007 film directed by David Fincher, chronicling the killings of the mysterious California killer known as Zodiac, as well as the people who tried to uncover his identity. The film focuses on three main characters: * Robert Graysmith (Jake Gyllenhaal) a cartoonist for the San Francisco Chronicle who becomes obsessed with the Zodiac. * David Toschi (Mark Ruffalo) a renowned San Francisco homicide detective who is put on the case indefinitely. * Paul Avery (Robert Downey, Jr.), a reporter on Zodiac for Chron.