This adaptation of Philip K Dick's novel "Do Androids Dream of Electric Sheep" stars Harrison Ford as a former police officer in 2019 Los Angeles, who is pressed back into service to help catch a group of fugitive androids, known as replicants.
Designed to look and behave like humans for use as slave labour in off-world colonies, replicants are considered too dangerous for use on Earth as the authorities fear they may be coming self aware, so its down to special police officers, known as Blade Runners, to seek out and destroy any that get past Earth security. But this particular group, lead by a highly intelligent replicant named Roy Batty (Rutger Hauer) are not just your standard bunch of robots on the run.
Seems they're on Earth because they're after something at the production plant they were designed in, but why would robots be interested in technical specs and why give a robot a mere four year lifespan? Directed by Ridley Scott, this was one of the first sci-fi films to really portray the future as anything but bright and cheerful, with the futuristic city of Los Angeles resembling a giant industrial complex, with overcrowded streets and the air choked with pollution.
Co-starring Brion James, Joanna Cassidy, Sean Young and Daryll Hannah, in one of her first screen roles, Blade Runner is an extremely dark, gritty sci-fi action/thriller, which sci-fi fans should thoroughly enjoy. If you've read Philip K Dick's original novel and haven't seen this yet you should do so at once.