The biggest bug in British dramas is their lack of logic.
If we are talking about parallel worlds, the biggest loophole is that the same person is actually a completely different person with different life experiences. Also completely different people. If it is a replica world, it is even more nonsense. The replica world appeared 30 years ago, and all human trajectories have changed since then. The human beings who appear and exist in the two worlds should be very different in terms of numbers, individuals themselves, and so on. The first female killer was no more than 30 years old, so the parents of the female killer may not have met, and there may not be this female killer.
A drama has collapsed in the most basic world construction, and there is no need to continue talking about it, it is all nonsense!
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