Build a movie plot around this: Who found and manipulated Sebastian? Pris.
A:
Note: Since there are several versions of Blade Runner, this summary excludes version-specific events.In Los Angeles in November 2019, ex-police officer Rick Deckard (Harrison Ford) is detained by officer Gaff (Edward James Olmos) and brought to his former supervisor, Bryant (M. Emmet Walsh). Deckard, whose job as a "Blade Runner" was to track down bioengineered beings known as replicants and "retire" (a euphemism for killing) them, is informed that four have come to Earth illegally. As Tyrell Corporation Nexus-6 models, they have only a four-year lifespan and may have come to Earth to try to extend their lives.Deckard watches a video of a Blade Runner named Holden administering the "Voight-Kampff" test designed to distinguish replicants from humans based on their emotional response to questions. The test subject, Leon (Brion James), shoots Holden after Holden asks about Leon's mother. Bryant wants Deckard to retire Leon and the other three replicants: Roy Batty (Rutger Hauer), Zhora (Joanna Cassidy), and Pris (Daryl Hannah). Deckard initially refuses, but after Bryant ambiguously threatens him, he reluctantly agrees.Deckard begins his investigation at the Tyrell Corporation to ensure that the test works on Nexus-6 models. While there, he discovers that Dr. Eldon Tyrell's (Joe Turkel) assistant Rachael (Sean Young) is an experimental replicant who believes herself to be human. Rachael has been given false memories to provide an "emotional cushion". As a result, a more extensive test is required to determine whether she is a replicant.Events are then set into motion that pit Deckard's search for the replicants against their search for Tyrell to force him to extend their lives. Roy and Leon investigate a replicant eye-manufacturing laboratory and learn of J.F. Sebastian (William Sanderson), a gifted genetic designer who works closely with Tyrell. Rachael visits Deckard at his apartment to prove her humanity by showing him a family photo, but after Deckard reveals that her memories are implants from Tyrell's...