Last night's Lost was much better than we'd expected from a Kate-centric episode. Partly, this was because Kate did a teeny bit of growing as a person. And partly it was because Jack and Sawyer stole the show. Spoilers avast...
So both Kates realized, last night, that they owed something to poor Claire Littleton. The only difference is, one of them made this realization in time, and the other one had the epiphany far, far too late.
A bit of housekeeping: According to Damon Lindelof and Carlton Cuse, we're not supposed to call the "Flight 815 landed safely" universe the alt-universe, because that implies that it's not "real" or that it's second best. Far be it from me to encourage bigotry against an entire universe — so let's call the two timelines the LA-verse and the Island-verse, shall we?
So in the LA-verse, Kate has a moment of — what's that unfamiliar feeling? — altruism, and goes back to rescue the pregnant woman she dumped in the middle of nowhere. She helps Claire deal with the callow woman (Jenni Blong) who was supposed to adopt Claire's baby with her husband — was this the couple recommended by Richard Malkin? — and then takes her to the hospital. You're definitely left with a sense that Kate and Claire share some kind of bond, which has to do with Aaron, and this is probably going to be significant in future episodes.