David Fincher's best overall film is also one of the decade's greatest, and his thrilling, pulsing, maddening opus, Zodiac, achieved instant-classic status, regarded equally among fans and critics, with Snowpiercer director Bong Joon Ho calling it a 'perfect film'. Fincher's sprawling, multi-faceted film tackles the story of San Francisco's notorious Zodiac killer, who terrorised the city for decades with his murders and subsequent puzzles, which he sent to newspapers and police, promising that he could be identified if the puzzles were solved. Starring Jake Gyllenhaal as the cartoonist obsessed with figuring out who the killer is, Zodiac is an intense immersion into the minds of those the Zodiac gripped (the Gyllenhaal character and Robert Downey Jr.'s reporter and Mark Ruffalo's detective also), as well as a portrait of the nervous fever the killer caused across San Francisco and America. It clocks in at nearly three hours, but Fincher's well paced, controlled, gorgeous direction ensures that Zodiac never feels like a slog, and, by the time it's over, you'll be just as perplexed as those the Zodiac obsessed. Which of these is your favourite Psychological Thriller? Share your own below in the comments thread.