Credits. I guarantee you, people are out there right now deciding that because there's a tree after Cecilia's picture, that means the merge will be next week. There's an entire science of credit-sequence fortune-telling, in case you don't know, and despite the fact that it's all utter nonsense, hundreds of hours are devoted to it. Thus concludes this week's lesson in The Internet: Go Figure.

We return to Aitu, still on Day 16, where it is raining lightly. Jonathan is reading a piece of treemail to the Nate-enriched tribe (more Nate than ever before!), and it implies that the upcoming challenge involves swimming and a whole lot of other stuff. It also advises the tribe to look through a little booklet, referred to as a "catalog," from which it can choose two items it wants. The prizes include oil and spices, a sewing kit, and a whole lot of other stuff. Nobody wants the sewing kit, which is too bad, because I'd love to see a little quilting bee. I like the idea of Jonathan with a needle and thread. The only things people are interested in, however, involve food. There is much love at Aitu for peanut butter in particular.

Raro, same time. Over there, the discussion quickly turns to peanut butter as well, but there's a disagreement over whether the accompanying carbohydrate of choice should be bread or potatoes. Brad is advocating potatoes, on the theory that they'll last a lot longer. Ultimately, the rest of the tribe admits that the bread won't last as long, but Parvati just viscerally wants a peanut-butter sandwich, which makes this the first time that any of the women on this show who need a sandwich have demonstrated an actual conscious wish for a sandwich. In the end, in spite of Brad's attempts to talk sense to them, they wind up opting for bread. Brad interviews that he was trying to do what was best for the tribe, but there's not much you can do when you lose the majority vote. And this is, of course, quite true, even when it comes to potatoes.

We zoom over to a challenge clearing. We are on a stretch of sand. Jeff waits for the tribes to arrive, then explains that in today's challenge, each tribe will pick three swimmers and two puzzle-solvers. Each swimmer, in turn, grabs a wooden club and swims out to a tower. The swimmer climbs to the top, then jumps off and, in mid-air, uses the club to smash a plaster box that's dangling in the air that contains a key. Are you with me? Oh, good. Then the swimmer fishes the key out of the water below and brings it back to shore. There are a total of six keys for the swimmers to retrieve, every swimmer has to go out at least once, and you can only bring back one key at a time. When your team has all six keys, the puzzle-makers will use the keys to open a box of puzzle pieces. They'll assemble the pieces into a map of the world, and then they'll be done. First tribe to finish will get the reward items that it chose. Raro chose the bread and peanut butter; as it turns out, Aitu chose potatoes and peanut butter. Brad looks bitter. He wishes he were with the potato tribe.