I don't think the bare-footed others are the same as those that abducted Claire. Even in their "pirate" outfits, the underground others were still fully clothed. The bare-foots seem more like a little nomad tribe.
I don't know what it is
, but the stuff
Ethan was pumping Claire's belly with is the same stuff
that Desmond was injecting himself with. And, gee wiz, look at the coding on the vials. I wonder where Desmond's stash is right now. Is it hidden? 'Cause Claire would go ape if she saw it in the hatch.
There's some other interesting easter eggs, but it's hard to know if they are intentional, or production errors. First, the orientation clip may have a scene
added into it. I think the difference in the tie is the biggest give away. Second, why did the record player
in the hatch change? (I can't believe people noticed these things, by the way.) Third, there's another strange inclusion in the hatch - an intentional discrepency with the laundy machines
And check out the crazy Christian-artwork vision
that Charlie had. That's another sweet easter-egg that I didn't notice as I watched the episode, like the smoke-monster in the pilot.