Question

in a cyberpunk vision of the future, man has developed the technology to create replicants. they are illegal on earth, and if they make it to our planet they are hunted down and killed.

Answer 1

This is a movie, as far as I know : )

The movie is- The Blade Runner, which sets in a cyberpunk vision of future, where human create humanoid clones of themselves with limited lifespans. They are used to serve alien colonies. Blade Runners are police who terminate or eliminate the clones. 

Answer 2

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$\implies$ ★ In a cyberpunk vision of the future, man has developed the technology to create replicants - humanoid androids with short, fixed lifespans - which are illegal on Earth, but are used in the off-world colonies. In Los Angeles, California, 2019, Deckard is a "blade runner", a cop who specializes in terminating replicants.

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