Claire returns on island to save Jin from Aldo & Justin

Back in the jungle, Jin stops for water and gets ambushed by Aldo and Justin, who aren't too happy about Kate's escape. Aldo, who quickly became as obnoxious as Pickett, suggests that they should kill him, but Justin objects saying "he's one of them," possibly referring to a candidate.

Jin tries to make an escape, but gets caught in a bear trap. As Aldo catches up to him and aims his gun, Claire shows up shooting Aldo twice and then Justin once. Jin looks up and notices it is claire. She looks back at him and looks bewildered.

So where has Claire been all of this time? Why has she taken to setting traps like Danielle Rousseau? Is she really claimed like Dogen says she is? I guess we'll find out soon enough.

Kate takes out Aldo & Justin + Justin is a talker

Out in the jungle, as Kate, Jin, Aldo and Justin are trekking across the island, Aldo says that the others are protecting the survivors from the smoke monster. When Jin asks about the Ajira flight, Aldo refuses to answer, while Justin starts to tell him about the flight before Aldo tells him to shut up.

As they keep moving, Justin stop's Kate from tripping a trip wire. Jin says that it looks like Danielle Rousseau's, but Justin starts to say that it can't be her's because she died years ago.

Aldo is being obnoxious because Kate doesn't seem to remember that she knocked him out at the Room 23 building in season 3. Kate knocks him out, and trips the wire causing the rocks to knock out Justin. She then takes some guns and makes a break for it, telling Jin she's escaping.

We can presume, as we see later in the episode, that Claire set this trap. We'll ask more questions about her later though.

Sayid's bullet wound heals over + Sawyer makes a break for it + Aldo returns

At the temple, Lennon runs to tell Dogen, who is slowly tapping away at a typewriter, that Sayid is alive.  Dogen looks worried, and grasps the charm (or whatever it is) that's attached to his necklace (I'll have a better shot of it later).

Outside, Jack looks at Sayid's bullet wound, which has almost completely healed over. Dogen and Lennon come to take Sayid away for questioning, and that's when Sawyer launches his escape. He tells them, specifically Kate, not to come after him.

After Sawyer's gone, we see Lennon desperately trying to find a way to get him back. That's when we see the other Aldo for the first time since the season 3 episode "Not In Portland" (which was his only other appearance). He's wielding a gun, telling everyone to "calm down." Kate offers to track Sawyer and bring him back and Jin offers to go with her. During this time, Sayid is taken away.