Blade Runner is a 1982 American neo-noir science fiction film directed by Ridley Scott, written by Hampton Fancher and David Peoples, and starring Harrison Ford, Rutger Hauer, Sean Young, and Edward James Olmos. It is a loose adaptation of the 1968 novel Do Androids Dream of Electric Sheep? by Philip K. Dick. The film is set in a dystopian Los Angeles in 2019, and depicts a future in which synthetic humans known as replicants are bioengineered by the powerful Tyrell Corporation to work on off-world colonies. When a fugitive group of replicants led by Roy Batty (Hauer) escape back to Earth, burnt-out cop Rick Deckard (Ford) reluctantly agrees to hunt them down. During his investigations, Deckard meets Rachael (Young), an advanced replicant who causes him to question his work.