Leon Kowalski

Villains
Leon Kowalski is one of four surviving escaped replicants to make it to earth and seek to extend his life span in the 1982 cult classic film  Blade Runner based on the 1968 speculative science fiction novel Do Androids Dream of Electric Sheep by Philip K. Dick. Leon is a genetically engineered human being created as a worker unit to do hard labor on off world colonies. Because he is a replicant, he was designed with a life span of only 4 years, and has already lived at least 2 at the time that he has come to Earth. Like the other replicants in the film, he is desperate to find a way to live longer than his built in expiration date dictates, and to avoid being caught by  Blade runners, the police branch created specifically to find and execute rogue replicants.