See, now I'm wondering if we ever saw Alt!Nina back in Ol' Blue, either. It's just so delightfully surprising, and I still can't say why we haven't all just been beside ourselves waiting for when we'd finally meet her - I think I may distantly remember wondering way back when we first saw the Redverse, that she was the one regular who, aside from Peter obviously, didn't seem to have an alt, but the show never mentioned it and it became the absolutely proverbial out of sight, out of mind.

My working theory now has to be that we've seen this alt!Nina the whole season. So if she's from the Other Side in the amber continuum (my God we need a better nomenclature for this shit), are they not aware their Nina is missing? Does she work with Walternate? I HAVE SO MANY QUESTIONS! But they are the best kinds of questions, where I'm just so excited about the fact the show has taken me someplace unexpected, and I just want to know moooooore.