In the loaded pantheon of drug cinema, Richard Linklater's "A Scanner Darkly" falls somewhere in the purgatory between "Fear and Loathing in Las Vegas" and "Harold and Kumar Go to White Castle." Based on a Philip K. Dick novel, "Scanner" is the story of Substance D, a sort of crack-on-crack hallucinogen with as many slaves as pushers and quite a reputation in government and law enforcement circles.
Keanu Reeves is Bob Arctor, a D-addicted divorcee hired by the local police force to rat out his D-addicted buddies, Woody Harrelson, Rory Cochrane, Winona Ryder and a never-punchier Robery Downey Jr. As the film progresses, the opening scene's sense of humor gives way to a melange of paranoia, espionage and the maze of withdrawal. As with many drug films, "Scanner" occasionally takes bigger bites into the drug culture than it can handle, but Linklater does his best to keep everything relatively grounded.