The Sun and Jin plotline was brilliant. You just never see character development like that on television anymore, and it was phenomenal.

(And for the question asked earlier... I don't think Sun cheated. The "other man" said, "Don't go to America. Stay... but for me, not Jin." From the first season, we know she didn't take that advice. I don't think she stayed for him at all, even temporarily.)

The Sayid and Ana subplot was tense and well-written. I thought it entirely well done. And Charlie was the perfect level of comic relief, not at all over-the-top.

The show was brilliantly written. Even Henry's wondering about the food in the hatch was so outside "stock character" stuff. It was brilliant, and the writing for all of his stuff was wonderful. The whole episode was well written.

I'm wondering about Henry's beard, though. The fact that he was cleanly shaved at capture coming up so immediately after the beard and theatrical glue just made me wonder a little. (Yeah, I know it was Zeke's, or whatever, but still, it seems to mean something, Henry's being shaved.)