Richard Linklater's 'A Scanner Darkly' Writer/Director Richard Linklater's film, A Scanner Darkly, is now out on DVD. Based on the book by Philip K. Dick, about drug addiction, paranoia and surveillance, it stars Robert Downey Jr., and Keanu Reeves. Linklater is a self-taught director and his other films include Slacker, Dazed & Confused and The School of Rock. This interview originally aired on Jul. 10, 2006.