Blade Runner

In the early 21st century, the Tyrell Corporation developed a new type of robot called Nexus, a being virtually identical to man and known as a Replicant. The Nexus-6 Replicants were superior in strength and agility, and at least equal in intelligence, to the genetic engineers who created them. In outer space, Replicants were used as slave laborers in the hazardous exploration and colonization of other planets. After the bloody rebellion of a Nexus-6 combat team in an off-world colony, Replicants were declared illegal on Earth under penalty of death. Special police squads, called Blade Runner Units, were ordered to shoot to kill on sight any invading Replicant. This was not called execution. It was called retirement.