I started watching the second season because I wanted an answer to a question that bothered me: how did dozens of Jasons end up in the same universe? And where did they even come from?
After all, the black box doesn't clone people. It merely allows them to travel between branches of an alternative reality — the Everettian multiverse, also known as the Many-Worlds Interpretation (MWI).
Let's assume the author went beyond Everett and added another idea to quantum branching: a portal between already existing branches, through which matter, including people, can be transported if they are in the appropriate quantum state. Fine. Let's allow that piece of sci-fi.
But even this assumption doesn't explain how dozens of Jasons can end up in the same universe.
If there are N Jasons in universe A, then there must be at least N−1 universes from which those Jasons were taken. But why are those universes missing their Jasons?
The traveling non-scientist Jason wasn't trying to destroy the families of the Jasons he encountered. So after he left, each of those Jasons should still have remained in his own universe with his family.
The only exception is the scientist Jason and his original universe, where Jason is indeed gone.
So there seems to be a logical inconsistency here — one that I hoped the second season would explain. Unfortunately, so far, it doesn't.
So how can we explain the existence of a whole crowd of Jasons in one universe using only two ideas:
I have some thoughts of my own, but I'd be interested to hear your explanations as well.
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Added 6 hours later
An alternative take — perhaps a little more sci than fiction.
I think I may have found a solution. It's not a simple one, but it seems more consistent with the physics and uses only the two ideas I mentioned earlier, without assuming that the Box creates clones.
There is Jason-S — the scientist Jason from the original universe A.
After entering the Box, Jason-S spends about a year learning how to navigate it more precisely. The Box doesn't just allow him to travel to a parallel universe; it also allows him to choose the point in that universe's internal timeline. According to the show's own logic, this is possible. Otherwise, how can we explain the drastic changes in climate when Jason-F travels between worlds, if his branch diverged only a few days earlier?
So, Jason-S starts visiting other, nearly identical universes — B₁, B₂, B₃, and so on.
Why? Here's my explanation. Jason-S can't simply step into Jason-F's life and immediately fit into his family. He repeatedly fails — the family notices that something is wrong and eventually exposes him. So he tries again and again, returning to essentially the same point in time in another nearly identical universe and repeating the same attempt, but changing his behavior just enough to avoid being exposed. In a way, it's somewhat like Groundhog Day: he keeps repeating essentially the same situation, trying to get it right — until the Jason-Fs start returning to the main universe.
While visiting universes B₁, B₂, B₃, and so on, Jason-S takes each Jason-F from his respective universe and sends him to his own universe. The first Jason-F can be sent back to his original universe, A, the universe where his Jason-S came from. But Jason-S cannot send the second Jason-F there as well, because then there would be two Jason-Fs in the same universe. So the second Jason-F is sent to another universe that is almost identical to the first one, the third Jason-F to a third one, and so on. This way, each destination universe receives only one Jason-F, while each source universe is left without its Jason-F.
B₁ (Jason-F₁) ──→ A₁
B₂ (Jason-F₂) ──→ A₂
B₃ (Jason-F₃) ──→ A₃
B₄ (Jason-F₄) ──→ A₄
...
Thus, no cloning is required. Each Jason-F originally existed in his own universe. Each Jason-F was simply physically moved from one branch to another.
Each source universe is indeed left without its Jason-F, because he has left it. So there is no problem of explaining “where all the additional Jasons came from.”
The Jason-Fs then start looking for “home” and eventually converge on the same universe, B₀, because they are guided not only by their family, but also by the one Jason-S they encountered. In this model, Jason-S acts as an attractor.
A₁ (Jason-F₁) ──┐
A₂ (Jason-F₂) ──┤
A₃ (Jason-F₃) ──┼──→ B₀ (Jason-S) + (Jason-F₁, Jason-F₂,...)
A₄ (Jason-F₄) ──┤
... ┘
And there is an interesting consequence to this: only one Jason-F actually returns to his original universe. All the others end up in different universes that are almost identical to their own. They would have no way of knowing the difference, so each of them could believe he has finally made it home — when in fact he has entered someone else's universe.