I think Claire may be changed by the island when she returns. I think she may turn into an OTHER.

I loved the revelation of the incident with the beast/Boone and Shannon being a hallucination - although you could tell that it was, because if Locke had actually kidnapped Shannon and tied her up, we would have seen him do it or it would have been suggested (e.g. Locke sneaking up on her or looking at her suspiciously or something). It looks like the island gives people what they desire - and Boone seems to desire Shannon's death (thus, he can be relieved of her).

Kinda liked how Sun revealed her comprehension to Kate.