In Blade Runner 2049, one of the central elements from the plot is the search for the child of Deckard and Rachel. What I don't understand is why it is so important for Wallace to find the child - after all, Wallace has Rachel's bones (as well as hair brought in by K), so he should therefore have access to Rachel's DNA, which could then be used to understand how she was able to have a child.

In fact, this DNA is likely how they made a new copy of Rachel. So at that point, don't they already hold the key to making replicants that can have children?

What would finding the child provide in addition to this?

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    I've seen another answer to this, can't remember what the original question was called though. To quickly summarize, the DNA from the bones of a replicant aren't enough to get the whole picture since they're assembled piece by piece (unlike a human, who grow from one cell). They had records of Rachael but weren't able to make a perfect copy (the original had working reproductive systems and according to Deckard wasn't the same). If they had the child, they'd be able to study an anomaly in the flesh and presumably use her as the template for new reproductive replicants. Nov 7, 2017 at 12:27
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    She wasn't a perfect copy - just one that was really good. He mentions her eye colour was wrong for example. Nov 8, 2017 at 1:45

5 Answers 5


Note: this answer contains spoilers for both Blade Runner and Blade Runner 2049.

I don't know if you are aware of the multiple cuts that were released of the original movie. The theatrical cut ends with the couple (Deckard+Rachael) running away, but it lacks some details that Ridley Scott had planned. Later on, he released the "Director's Cut" that changed everything.

If you consider only the theatrical cut, then the child of both is a hybrid, but the director's cut reveals that Deckard is, in fact, a replicant. There is a scene where he dreams about a unicorn. The last scene of the movie shows him noticing an origami unicorn on the floor, left there by another cop. Dreams are one of the keys to determine whether someone is a replicant. As they are implanted, real people know the dreams the replicants have. I think there are some issues with the original plot to determine that Deckard is a replicant, but at the end of the day, I can't go against Ridley Scott himself, who confirmed this theory.

Moving to Blade Runner 2049, now you know the child is born from two replicants. So Deckard, just as Rachel, is a special creation of Tyrell (he even gets old!). Denis Villeneuve avoids addressing this with certainty, so that Wallace could try to recreate Rachael and fail. But he hints that Wallace suspects about Deckard being a replicant when he captures Harrison Ford's character.

So Rachael is not the key, at least not alone. Both are the key, or they form a combination of key and lock.

The child, then, is the combination of both, the fruit of life directly reproduced by replicants.

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    But, as I commented on the other answer, the new film doesn't ever pick a side in the Deckard is human/a replicant debate. We have no clue whether it's a sequel to the theatrical or director cut.
    – Catija
    Nov 7, 2017 at 13:00
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    I agree that it doesn't pick a side, and personally love that they chose to do it this way. I do prefer the human side of the debate, although I believe it's a lost battle as for the first movie. Nov 7, 2017 at 13:05
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    The Director's doesn't reveal anything at all, and certainly not "in fact". It suggests it as a possibility, which the new movie leaves as exactly that and nothing more.
    – Napoleon Wilson
    Nov 7, 2017 at 13:07
  • I think a great answer to this question would include interpretations from both angles. :) A good one, only one.
    – Catija
    Nov 7, 2017 at 13:11
  • The first answer resulted from the interpretation of one angle, so I tried to the detail the other. But I will take that into account for the next time, thanks for the feedback. Nov 7, 2017 at 13:17

They have not yielded the necessary information to replicate the issue, by virtue of the fact they are still looking for the child.

Logically, you are correct; they have Rachel's DNA. The fact the records were destroyed was an overt attempt to conceal as much as possible from Wallace, so it's possible that her DNA holds some key. However, it's clearly not enough. Clearly the 'new rachel' cannot conceive hybrid children; otherwise, the search would be 'over'. They need a complete set of records, including Deckard.

Rachel is a replicant, Deckard was a human. The child is a hybrid. By all accounts, this was considered impossible. The answer to how this was infact possible can only be found by an examination of the subject itself.

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    Everything I've read about the film implies that it doesn't actually confirm that he's human and, having seen it, I'd agree.
    – Catija
    Nov 7, 2017 at 12:46
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    There's no strong evidence to say that "Deckard was a human". Even Wallace says in the film that he doesn't know.
    – Tom Bowen
    Nov 7, 2017 at 15:28
  • From recent memory, Wallace actually says the DNA wasn't enough and he needs the child (which is plausible if the DNA has degraded from 30 years of weathering).
    – matt_black
    Feb 8, 2018 at 12:33

From multiple viewings of BR2049, I noticed Wallace says to Deckard that, "I have the lock and the key, yet the key doesn't fit; the door remains locked. I need the child." This is when he is holding the skull of Rachel in front of Deckard, implying that, though he's tried with what he has to discover the secret to reproduction, he can't figure it out from bones. He needs the hybrid / Replicant child to fully understand, because from the child he can examine it, dissect it, to understand fully the child and how it was created.

While Wallace doesn't explain why he couldn't understand Rachel's DNA for the reproduction, it can be inferred that the blackout that wiped out the data on the Nexus 7s is needed to fully understand it, or a live specimen that can be explored.


Wallace had a perfect copy of Rachel, but that still wasn't enough. To be clear, he had a perfect copy of her, and Deckard was just lying about the eye color. You can easily fact check this by rewatching the scene in BR1 where Rachel is taking the Voigt-Kampff test that zooms in on her eye for a long period: her eyes are brown in BR1 and her clone's eyes are brown in BR2.

So Wallace has the lock (the mother), but not the key (the father). He has strong reason to believe Deckard is the key, but if he's not going to cooperate or if he also doesn't have the answer Wallace is looking for (whether that be in his DNA, or him giving up the location of his daughter), the child is the only remaining lead.

  • We don't know the copy was perfect. It was good, but the DNA could have been corrupted enough that it wasn't perfect, ruining the functionality he wanted.
    – matt_black
    Feb 8, 2018 at 12:34
  • @matt_black Wallace said he "had the lock". If he had any doubt, he certainly didn't show it. And I realize it's a film, but they seem to be pretty keen on being accurate, so I don't think it's unreasonable to point out that if his copy of Rachel's DNA wasn't perfect, she wouldn't look exactly like Rachel but with the wrong eye color. DNA isn't that easy.
    – Zeek Aran
    Feb 9, 2018 at 13:47

Having recently rewatched, particularly the scene in which Wallace 'assesses' the new model replicant before gutting her womb: I've re-evaluated the question and my previous answer.

9 Planets... a Child could count to 9 on it's hands. By now we should own the stars.

Wallace brought the replicants under control, and the replicants (more specifically the mistrust of them creating the societal trend to 'lose their appetite for slaves') has become a limit on the growth of Wallace' Empire.

Wallace's replicants are at the forefront of other planets' colonisation, the trailblazers for humanity's expansion into the cosmos. Regardless of whether these agents of humanity are finding new conditions for life, or simply strip-mining planets for resources, they are at the tip of the spear.

Wallace is a capitalist overlord with multigenerational ambitions: he is interested in building a legacy, beyond wealth. The only way to colonise the galaxy, in his name and in his image (as God), is to create a replicant species capable of pro-creation: a new race under his design, aboard ships full of replicants who will re-produce (as is necessary for 200+ year journeys).

We don't know if it's possible to re-animate replicants after stasis of 200+ years (or whatever the journey may be); that's irrelevant to Wallace. He see's himself as God, and wants to make sure the species he creates continues long after his death. The only way to achieve this is procreating replicants; and Rachel's 'Miracle' is the key to this, hence her importance.

  • That's all well and good, but really only adresses the question why Wallace would want procreating replicants in the first place. This isn't contested by the question, however. The question asks what they needed the child for if they already had Rachael and should thus theoretically have the secret fro procreation already. You previous answer already adresses that and this one seems more like a side comment on a question that would be asked before this one but wasn't here.
    – Napoleon Wilson
    Jul 27, 2018 at 23:03

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