A Scanner Darkly
The movie is directed by Richard Linklater ("Before Sunrise", "Before Sunset" and "Waking Life"). Keanu Reaves plays Bob Arctor, the Orange County narc who goes schizo after being assigned to spy on himself. The rest of the cast includes Winona Ryder, Robert Downey Jr., Woody Harrelson, and Rory Cochrane... Some of the most famous druggies in Hollywood today.