This movie was incredible. I am a big fan of David Fincher, as I love his visuals ... but the storytelling of the Zodiac murders and the acting is what blew me away. Robert Downey Jr. has to be one of our best actors and Jake Gyllenhaal really steps up to make the role of Robert Graysmith is own. Mark Ruffalo is awesome as always. The movie had an eerie sense of creepiness, and a heavy shroud of anxiousness that made you feel as if you were in San Francisco during the time of the murders, waiting for the Zodiac's next letter of intent, or a report of a new killing. Facts and formulations have never been so entertaining - or compelling. You feel defenseless and ambitious at the same time - someone needs to find the killer and if they do, will anyone really know for sure? Mark Ruffalo and Jake Gyllenhaal's characters bring all the right things into question. Missing or no communication between police departments, blood testing, tainted evidence, hand writing analysis.... testing has vastly improved. Can someone please look into this case - and why hasn't it already been done? This movie delivers true Hollywood entertainment.