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It looks like Michael, Jin, and a possibly wounded Sawyer have clung to a piece of the raft and got themselves to shore, on a different side of the island. Here they encounter the Flight 815 survivors from the tail section. (Adewale Akinnuoye-Agbaje whose character is named Dr. Ako. Nice and convenient that a doctor survived both parts of the crash. Something tells me he's not Rose's husband though. Also Michele Rodriguez as Ana-Lucia Cortez, Jolene Blalock as Nikki, and Cynthia Watros as Libby.) I also went to IMdB and found that Locke's nasty father will reappear in episode 3. Along with the famous "Helen", played by Katey Sagal. (Bad casting if you ask me.) Looks like Desmond will be around for at least 3 episodes. And the tail-section people seem to have dug a pit, as a trap for possible predators.