Probst calls the start and both tribes take off running. It seems like Zapatera benefits in the first stage from having more dudes. They get some good momentum going with the blocks while Ometepe seems to actually stop all forward movement at times. Zapatera gets all four blocks in place while Ometepe is just starting with their last block. Ralph does the chopping for Zapatera, and they quickly move on to the third stage. Ometepe finally moves on to the second stage and Matt takes what feels like forever to chop through the ropes. David appears to take the lead in helping Zapatera with the puzzle, but you have Rob the Puzzle Master on the other side, and Ometepe quickly closes the gap. David appears to let Russell take the lead on the puzzle, though I've seen it written elsewhere that David was still actually calling the shots, quietly. So he's one to watch. Anyway, despite making great strides, Ometepe can't close the deal and Zapatera wins immunity.
Probst awards the Immunity Idol to Russell and Zapatera, along with the flint. Russell makes a gesture to Rob like, "See what I got? Don't you wish that you had it?" Rob just looks worried and kind of disgusted. We've had VERY few interviews with Rob so far, no? For someone who usually loves to spew his big opinions about everything? I wonder what he's thinking. Anyway, Russell interviews that his tribe is stronger, faster, and smarter, and Rob must be worried.
Ometepe trudges back to camp after the challenge. Ashley (who?) interviews that she knows it's weird, but she feels like they let Rob down, since he's their leader and all. Rob would probably do well to pretend like he doesn't want to be the leader, since the leader usually gets picked off. Then again, since they all think he's the leader, most of them plan to do whatever he tells them to do.
Everyone goes for a swim to wash the stink of loser-dom off their bodies. Kristina and Francesca hang back, and Kristina reveals that she has the HII. Francesca is like, "Who? Why? How? What?" Kristina lays out her plan: she doesn't think they can trust the other women, so they should convince everyone to vote for Kristina, while Kristina, Francesca, and Phillip vote for Rob. Then Kristina will play the idol, and Rob will go home. I do think it's a good move; I don't know that I would play the idol that quickly. Especially since Rob wouldn't go home; he'd go to Redemption Island and potentially come back, more pissed off than ever. Anyway, Francesca is still like, "But...you didn't have a clue? How did you find the HII?"