The creepy potency of Dick's premise remains: The drug war's been lost, citizens are kept under rigid surveillance by holographic scanning recorders, and a schizoid addict named Bob Arctor (Keanu Reeves) is facing an identity crisis he's not even aware of: Due to his voluminous intake of the highly addictive psychotropic drug Substance D, Arctor's brain has been split in two, each hemisphere functioning separately. So he doesn't know that he's also Agent Fred, an undercover agent assigned to infiltrate Arctor's circle of friends (played by Woody Harrelson, Winona Ryder, Rory Cochrane, and Robert Downey, Jr.) to track down the secret source of Substance D. As he wears a "scramble suit" that constantly shifts identities and renders Agent Fred/Arctor into "the ultimate everyman," Dick's drug-addled antihero must come to grips with a society where, as the movie's tag-line makes clear, "everything is not going to be OK."
While it's virtually guaranteed to achieve some kind of cult status, A Scanner Darkly lacks the paranoid intensity of Dick's novel, and Linklater's established penchant for loose and loopy dialogue doesn't always work here, with an emphasis on drug-culture humor instead of the panicked anxiety that Dick's novel conveys. As for the use of "interpolated rotoscoping"--the technique used to apply shifting, highly stylized animation over conventional live-action footage--it's purely a matter of personal preference. The film's look is appropriate to Dick's dark, cautionary story about the high price of addiction, but it also robs performances of nuance and turns the seriousness of Dick's story into... well, a cartoon. Opinions will differ, but A Scanner Darkly is definitely worth a look--or two, if the mind-rattling plot doesn't sink in the first time around. --Jeff Shannon