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Shane Carruth (born 1972) is an American filmmaker, screenwriter, composer, and actor. He is the writer, director, and co-star of the prize-winning science-fiction film Primer (2004), which was his debut feature. His second film, Upstream Color (2013), was an experimental science-fiction film which he wrote, directed, produced, edited, designed, and starred in. He also composed the scores for both films. Wikipedia