Fincher’s skill is undeniable. I've read some commentary suggesting this film signifies Fincher’s maturation as a filmmaker, and while I can see where that comes from, it isn't quite accurate. Instead, what he has done is apply his trademark meticulousness and precision to a real-life story, leaving no detail unexplored. It’s simply one of the finest films depicting the investigative process surrounding a notorious serial killer—a character study so compelling it deserves recognition among genre classics. The film's brilliance lies in its inability to deliver a conventional, crowd-pleasing resolution. Because this is based on actual events, any research will confirm there’s no unexpected twist or celebratory ending; it simply concludes as it must, frustratingly brilliant. The case at the center of the story completely absorbs everyone involved, and witnessing the toll it takes on them is captivating (and disheartening). If you choose to invest yourself in this film, it has the power to consume you, both the movie itself and the performances within demand that you experience it as a deeply affecting exploration of character. The acting here restores my faith in classic performance styles flourishing today. I wasn’t initially impressed with Mark Ruffalo's earlier work, but his portrayal of David Toschi is so full of genuine feeling that I felt compelled to apologize to him in writing! Robert Downey Jr. shines as Paul Avery, embodying 60s style and confidence without descending into a cartoonish imitation (both men would later become Avengers). Surprisingly, I found Jake Gyllenhaal’s performance as Robert Graysmith to be the film's true anchor—the central emotional core—demanding complete focus; it’s a result of Fincher’s relentless pursuit of perfection in every aspect of filmmaking. Gyllenhaal reportedly disliked working on the project, and resented Fincher’s demanding approach, but he must now recognize that the director drew out a performance that has come to be regarded as both exceptional and advantageous for his career (leading to roles like *Nightcrawler*). This isn't a sequel to *Se7en*, and British film publications such as Empire should have known better than to use that description to attract readers, because those seeking typical serial killer thrillers will likely be disappointed. However, if you appreciate outstanding cinema exploring the human mind during the hunt for a serial killer—then prepare yourself, this is among the very best films of the decade. 10/10

Source on TMDB