Less pyrotechnics and more drama. As far as I'm concerned that is a major plus in a Fincher movie. Rigorous and long but compelling just the same. A script, finally, that is almost totally devoid of cheap shots in a story that lent itself for cheap shots. It reminded me a little of Richard Fleischer's The Boston Strangler with a major difference: most of us know the story remains inconclusive - well, I don't know if "most" I certainly did - but, strangely enough it doesn't detract from its fun moments of suspense and the thoroughness of the proceedings. Robert Downey Jr is superb, immediately recognizable and totally believable at the same time. Jake Gylenhaall's connection with us - the audience - is strong and powerful as well as Mark Ruffalo's cop. All in all one of Fincher's most serious, and best films.