In episode 6, we discover that Young Jonas is Schrödinger’s cat. Martha goes to live in a cage, like Hansel waiting for the fairy-tale witch to eat him/her. We finally learn the contents of Martha’s letter to Stranger Jonas, but of course the letter leaves him bitter, because that is Jonas’ relationship to letters from the dead. We relive the apocalypse in the Prime world, because we just can’t get enough, and live through Martha’s apocalypse for the first time.
Meanwhile, in the Prime world, we jump back to the end of S2, where Young Jonas kneels over Dead Prime Martha’s body and promises he’ll make this right, somehow, somewhere, sometime. But right now, a nuclear apocalypse is coming, so he’s going to abandon her body to its fate and run downstairs to hide in his mom’s basement.
What, that’s not how you remember the end of season 2 going? Go check the footage. I’ll wait.