Zodiac (2007)

The true life Zodiac killer was an inspiration on Dirty Harry (which is briefly referenced - that they would make this film with the real killer still at large is surprising) and for me this is Fincher's most engaging work to date, hampered a little by mumbling and/or poor sound mixing.

Jake Gyllenhaal, Robert Downey Jr., Mark Ruffalo (Shutter Island, The Kids are Alright), Anthony Edwards, Brian Cox, John Carrol Lynch (the supposed killer: Crazy Stupid Love, Shutter Island), Chloe Sevigny and many other good supporting actors.

Harris Savides lights the decades evocatively (in Panavision):

Angus Wall's editing provides momentum when you need it.

Ultimately though, because the killer's identity is never absolutely confirmed, it's a little disappointing for the audience, including the Cannes Jury, who didn't give it the Palme D'Or.

Good period detail.