A Scanner Darkly (2006)

Live-action solarized rotoscoping animation is the perfect technique to carry off this psychedelic tale by Phillip K. Dick about a future where drugs are the new terrorism. Keanu Reaves does his Mr. Anderson thing as a narcotics officer who doesn't yet know he has a dual personality in the squirmy, psychotic "Bob" and Robert Downey Jr. is excellent as his Jeff Goldblum-like sidekick; was Woody Harrelson acting to portray a whacked-out goop or was he just being himself? Several twists at the end add fresh layers to the story. It's no Memento but you'll probably want to watch it twice to pin the whole plot down. 4.5 stars.