Blade Runner is a 1982 American sci-fi film, directed by Ridley Scott and starring Harrison Ford, Rutger Hauer, and Sean Young. The screenplay, written by Hampton Fancher and David Peoples, is based loosely on the novel Do Androids Dream of Electric Sheep? by Philip K. Dick.

The film depicts a dystopian Los Angeles in November 2019 in which genetically engineered beings called replicants—visually indistinguishable from adult humans—are manufactured by the all-powerful Tyrell Corporation. As a result of a violent replicant uprising, their use on Earth is banned, and replicants are exclusively used for dangerous or menial work on Earth's off-world colonies. Replicants who defy the ban and return to Earth are hunted down and "retired" by police assassins known as "blade runners". The plot focuses on a brutal and cunning group of recently escaped replicants hiding in Los Angeles and the semi-retired blade runner, Rick Deckard, who reluctantly agrees to take on one more assignment.