A Scanner Darkly is a 2006 film by Richard Linklater based on the Philip K. Dick novel of the same name. The film tells the story of identity and deception in a near-future dystopia constantly monitored by intensive high-technology police surveillance in the midst of a huge drug addiction epidemic. To give the film its distinct look, the movie was filmed digitally and then animated using interpolated rotoscope over the original footage.

The film was written and directed by Richard Linklater, and it stars Keanu Reeves, Winona Ryder, Woody Harrelson, Robert Downey, Jr., and Rory Cochrane. Steven Soderbergh and George Clooney are among the film's executive producers. A Scanner Darkly was released in July 2006 in limited release, and then widely released later that month. The movie was screened at the 2006 Cannes Film Festival and the 2006 Seattle International Film Festival. The film was nominated for the Hugo Award for Best Dramatic Presentation, Long Form in 2007.

The title is a reference to a verse in the New Testament of the Bible, 1 Corinthians: 13:12: "For now we see through a glass, darkly."

In a totalitarian society in a near future, the undercover detective Bob Arctor is working with a small time group of drug users trying to reach the big distributors of a brain-damaging drug called Substance D. His assignment is promoted by the recovery center New Path Corporation, and when Bob begins to lose his own identity and have schizophrenic behavior, he is submitted to tests to check his mental conditions. Written by Claudio Carvalho, Rio de Janeiro, Brazil

The L.A. of a not-too-distant future suffers a surge of drug abuse involving a new ultra-addictive and eventually brain-damaging substance simply named "D". Bob Arctor is an undercover narc leading a double life, dutifully reporting to his superiors while effectively having abandoned whatever normal existence he had for a "D" user/dealer career. But this schizophrenic situation and the drug-induced memory and concentration lapses put Bob under mounting stress. Written by Armin Ortmann {armin@sfb288.math.tu-berlin.de}