/>Deckard agrees to track down Leon and three other replicantsoy Batty (Rutger Hauer), Zhora (Joanna Cassidy) and Pris (Daryl Hannah)fter Bryant threatens him. These replicantsyrell Corporation Nexus-6 modelsave a four-year lifespan as a failsafe to prevent them from developing emotions and desire for independence. They may have come to Earth to try to have these lifespans extended.
Deckard is teamed with Gaff and sent to the Tyrell Corporation to ensure that the Voight-Kampff test works on Nexus-6 models. While there, Deckard discovers that Tyrell’s (Joe Turkel) assistant Rachael (Sean Young) is an experimental replicant who believes she is human; Rachael’s consciousness has been enhanced with childhood memories from Tyrell’s niece. As a result, a more extensive Voight-Kampff test is required to identify her as a replicant. During the testing Rachael suggests that