Then we hear, in the distance, "Kate! Locke!" Desmond whirls around, points the gun back at Locke. "What's that?" "That would be Jack," says Locke, looking more curious than anything about how this is all going to play out. Of course, Locke's odds of survival just went up. I don't mean because Jack is there to rescue him, just that...well, if you had a rifle, who would be your first choice to shoot? Jack or Locke? That's what I'm talking about.

Back from commercial, Desmond hauls Locke over to his bazooka telescope tube, where he watches Jack make his way down the hall. He asks Locke who it is. "He's our doctor," says Locke. Desmond asks what he's doing here. "To be honest with you, I'm surprised to see him." How about you try answering the crazy rifle-toting man's question instead of making a wiseass remark? Desmond keeps watching him. "Your doctor has a gun, brothah." He hauls Locke over the record player, and you're kind of half-expecting him to say, "Have you ever actually really listened to Jethro Tull? Like really listened to it?" Instead, he drops the needle on a record, and "Make Your Own Kind of Music" comes back on.

Up in the Air Duct of Skulking Pendulous Cleavage, Kate stops creeping along just long enough to make her patented My God, Is That Mama Cass? face.

"Make one sound and I'll shoot," says Desmond, shoving Locke and telling him again to move.

Kate hustles as fast as her elbows and knees will take her, making her way to a vent overlooking the room of obsolete machinery room, where she can see Jack looking around. She shouts his name a couple of times, but Kate's got a long way to go before her lungs can compete with Mama Cass.

The rest of this we saw last week, with Jack about to press a button on the computer, Locke coming in to say he shouldn't do that, and then Desmond pointing his gun and then Jack taunting Locke and then Jack recognizing Desmond. (This time, though, when Desmond fires his warning shot, we see that it almost hits Kate.)