When Ben shows up at the dock and Kate looks startled, is she just reacting to the fact that Jack and Sayid are apparently working with Ben, or is she also just realizing that Ben has gotten off the island? Because I've lost track of who would have found out that Ben made it off the island. Sayid and Sun have certainly known about it for some time, but they might have had reasons not to share it with the others. Did Jack and Hurley not know Ben was off the island until very recently? Actually, I guess Locke-as-Jeremy Bentham would have probably told all of them, though I guess he also might have had reasons not to give them the full story......though it's not obvious what those reasons would be. Hmmmm......all things considered, I guess Kate most likely already knew.