Blade Runner is a 1982 American tech-noir film, directed by Ridley Scott. The screenplay, written by Hampton Fancher and David Peoples, was based on the novel Do Androids Dream of Electric Sheep? by Philip K. Dick. The film stars Harrison Ford and features Rutger Hauer, Sean Young, Edward James Olmos, M. Emmet Walsh, and Daryl Hannah.

The film depicts a dystopian Los Angeles in November 2019 in which genetically manufactured beings called replicants - visually indistinguishable from adult humans - are used for dangerous and degrading work in Earth's "off-world colonies". Following a small replicant uprising, replicants become illegal on Earth; and specialist police called "blade runners" are trained to hunt down and "retire" (kill) escaped replicants on Earth. The plot focuses on a brutal and cunning group of replicants hiding in Los Angeles and a semi-retired blade runner, Rick Deckard (Ford), who reluctantly agrees to take on one more assignment.

Blade Runner initially polarized critics; some were displeased with the pacing, while others enjoyed its thematic complexity. The film performed poorly in North American theaters. Despite the box office failure of the film, it has since become a cult classic. Blade Runner has been hailed for its production design, depicting a "retrofitted" future. The film is credited with prefiguring important concerns of the late 20th and early 21st centuries, such as overpopulation, globalization, climate change and genetic engineering. It remains a leading example of the neo-noir genre. Blade Runner brought author Philip K. Dick to the attention of Hollywood, and several more films have since been based on his work. Ridley Scott regards Blade Runner as "probably" his "most complete and personal film". In 2007, the American Film Institute named it the 97th greatest American film of all time in the 10th Anniversary edition of its 100 years... 100 Movies list.

In 1993, Blade Runner was selected for preservation in the United States National Film Registry by the Library of Congress as being "culturally, historically, or aesthetically significant".

Seven versions of the film have been created, for various markets, and 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 to see a DVD release, resulting in a basic disc with mediocre video and audio quality. In late 2007 Warner Bros. released in theater and DVD, HD-DVD, Blu-Ray the 25th anniversary long-awaited digitally remastered definitive Final Cut by Scott.

In a cyberpunk vision of the future, man has developed the technology to create replicants, human clones used to serve in the colonies outside Earth but with fixed lifespans. In Los Angeles, 2019, Deckard is a Blade Runner, a cop who specialises in terminating replicants. Originally in retirement, he is forced to re-enter the force when five replicants escape from an offworld colony to Earth. Written by Graeme Roy

Los Angeles, 2019: Rick Deckard of the LPD's Blade Runner unit prowls the steel & micro-chip jungle of the 21st century for assumed humanoids known as 'replicants'. Replicants were declared illegal after a bloody mutiny on an Off-World Colony, and are to be terminated upon detection. Man's obsession with creating a being equal to himself has back-fired. Written by Matt McQuillan

Deckard is a Blade Runner, a police man of the future who hunts down and terminates replicants, artificially created humans. He wants to get out of the force, but is drawn back in when 4 "skin jobs", a slang term for replicants, hijack a ship back to Earth. The city that Deckard must search for his prey is a huge, sprawling, bleak vision of the future. This film questions what it is to be human, and why life is so precious. Written by Greg Bole