Timelines and stuff are playing a big part now, I'm actually starting to thing that the original residents of the island descended from the crew of the Black Rock, the big ship in the middle of the island where Sawyer killed Cooper, and where they get their supply of dynamite.
Desmond went back in time, and can now see future timelines, but that Richard dude with the creepy eyeliner, I think he just doesn't age, and I imagine he's not the only one. What surprised me was that Ben is the leader, not Richard, possibly because Ben killed his own dad, now that Locke has done the same, and also heard Jacob, well Ben is threatened, which is why Locke is lying at the bottom of the mass grave, and Ben is now on borrowed time IMO.
I'm thinking that Tom (Mr.Friendly) or maybe even Mikhail will help Locke, but Locke has no desire to become the leader of the others, Jack on the other hand, well we'll see
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Juliette is cool, but my fave character has to be Desmond, it's like everyones been damn unlucky, while he's been picked on if you know what I mean - he was sent to the island as punishment while everyone else 'apparently' crashed there or willingly went there.