Blade Runner is a 1982 American science fiction 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". Any 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. Seven versions of the film have been shown for various markets as a result of controversial changes made by film executives. A rushed director's cut was released in 1992 after a strong response to workprint screenings. This, in conjunction with its popularity as a video rental, made it one of the first films released on DVD, resulting in a basic disc with mediocre video and audio quality. In 2007, Warner Bros. released in select theaters, and on DVD/HD DVD/Blu-ray, the 25th anniversary digitally remastered definitive Final Cut by Scott. (via Wikipedia)