Oh, uh - the universe where you lived just prior to this one, I mean. I've taken to calling that one Earth-Alpha and this one Earth-Beta, for lack of a better name.

[He picked up that term from Thomas' big report like three days after he got here, and might have forgotten that he is literally the only person who calls it that.

(His own world, for the record, he's been calling Earth-♇, and the one with the Kaiju is Earth-K.)]