Dusk til Dawn
Dr. Eldon Tyrell
Dr. Eldon Tyrell is the genius who has built up the large Tyrell Corporation. His creations are Replicants, some of which have been given away as an incentive for people to emigrate to the Off-World colonies. Others are used in combat to protect those settlers.
Roy Batty, along with J.F. Sebastian, finds Tyrell, and asks him to extend his life beyond the four-year limit built into Nexus Six replicants. However, this request was impossible to satisfy. After the mutiny, when the limit was implemented, replicants were given superhuman capabilities in order to ensure maximum performance in this limited time; capabilities that burn them out like falling stars.
Dr. Tyrell has done work in other genetic fields, including genetic augmentation and genetic cloning. He has since moved into the replicant application an exetension of his ego; creating life from nothing.