fixed to say that two replicants were killed by an electric field at the Tyrell Corporation; in previous versions of the film, he states it was only one replicant. Other replicants: Rachael, (played by Sean Young) is a prototype replicant, with implanted memories from Eldon Tyrell's niece. The sequel film further elaborates on this by revealing it was designed as a test run for a replicant that can become pregnant. While Deckard discusses Rachael with Tyrell, Tyrell states that to better control them, he started to implant false memories to give them the years of experiences that humans take for granted; creating a "cushion or pillow for their emotions." Nexus-6 units were designed to have a four-year lifespan to avoid emotional development, and all attempts to increase a replicant's lifespan have resulted in death. According to Deckard, a normal replicant can usually be discovered using the Voight-Kampff test within 20–30 questions, though Rachael answers over one hundred questions before Deckard determines she is a replicant. The second film further develops Rachael's origin, and gives significantly more details about its radical design. It revealed that it was an experimental model of replicant with a high percentage of human organs, including human reproductive organs, and that Rachael conceived a child with Deckard. As Rachael died during childbirth, its possible survival beyond the four years was undetermined. Blade Runner 2049 The sequel, Blade Runner 2049, is set thirty years after the original. In the intervening 30 years, several new replicant lines were introduced. The sequel retroactively establishes that Rachael was part of a short-lived prototype line of replicants designated Nexus-7, which was not only intended as a test to make replicants more mentally stable with implanted memories, but also to develop replicants capable of procreation. Rachael died in childbirth in 2021, and the child was hidden by the replicant underground. Tyrell was killed during the events of the first movie in November 2019, and the secret of producing replicants capable of procreation died with him. In 2020, the Tyrell Corporation introduced the Nexus-8 replicant, whose lifespans were not limited to four years. The Nexus-8 went into mass production, but a new wave of replicant rebellions occurred, culminating in rogue Nexus-8 replicants detonating a nuclear weapon in orbit over the western United States to create an electromagnetic pulse. The pulse destroyed most records about replicants, making it difficult for humans to track them down