[If he wasn't sure that they were from different worlds before, the fact that Walter can mention demons taking over Tokyo with a straight face assures him that they really are from different places.

He can't help but to snort at the thought; demons, being real. How ridiculous.]

Yeah, we didn't have any magic creatures running around. So that's two Tokyo's that struck out on the whole "not getting blown up anyway" deal, maybe there's more. If you care that much, look it up once we're done in here.

[It's not like he has any plans to do so. There was no point in going around digging up information on places that didn't exist anymore, even if it was an entire planet.]