When the kids get to the showdown field outside of town, it's warmed up even more, because most of them have foregone their sweatshirts. There's a rather large artifact in the middle distance. Kelsey (Yellow, 11, from Pennsylvania) says, "I saw this huge, blue thing and I was like, 'What is that?'" No, it's not an IKEA store; it's an inflatable, 45-foot water slide. "And don't worry, guys," Jonathan adds. "It's heated!" The kids erupt excitedly, as they do. Jonathan explains that this is one of their reward options in the event that every team finishes in an hour. If the Council picks that, they can put it in the center of town and use it whenever they want. DK thinks that'll make the whole town into an amusement park. It'll be an amusement park in which you have to cook your own food and wash your own clothes, but maybe there's a case to be made that that's preferable to being charged twelve dollars for a hot dog. Jonathan tells them that choice number two is under the rusty barrel he's standing next to, but they won't get to find out what's in there until afterwards. Too bad the show was too cheap to spring for a 46-foot crate to hide that water slide in.

So here's the challenge, and again, it's water-based. Again: brr. The kids have to use the stacks of PVC plumbing pipes and joints in front of them to transport water from pumps on one end of the field to different-colored water wheels way on the other end of the field. And the pipes have to go through a veritable obstacle course -- through an outhouse, a barrel, and a wall with many pipes sticking out of it (only one of which will work). And they're going to have to do it with the water running. Brrr! Just like last week, the first team to complete the task and return to the finish line gets to be Upper Class, the second gets to be Merchant Class, and so on. Laurel interviews, "It would be pretty embarrassing to get last place twice in a row." It certainly would. Not that that's a spoiler or anything.

Jonathan clicks his stopwatch and the kids get busy. Before long, Jonathan turns on the water, and it starts gushing from the pipes that kids are trying to assemble. This is going to get really muddy. Not much to recap here, except a bunch of kids assembling pipe. In a weirdly edited interview, Mike says in past tense that Blue was expected to have an advantage with the older kids, but he is confident -- present tense -- that Red will do well. Except Greg interviews that he and Blaine have both worked with PVC, and he has experience routing a sprinkler system, so that seems like a pretty clear edge for Greg's team. Where is Greg getting all these different kinds of experiences, anyway? I'm hoping a week will come when the town has to deal with a band of ornery goat rustlers. "I've been in a couple of posses, and I know how to tie a noose," Greg will mildly inform us. Guylan (11, Red, from Massachusetts) interviews about his idea for division of labor. We see kids using hay bales to prop up pipes that have to span long distances between structures. Laurel gives another interview -- in another location -- about how much it will suck to lose twice. It certainly will. Yellow's secret weapon seems to be Zach, who's dashing all up and down the line fixing leaks. Thirty minutes in, Blue and Red have both reached their walls. Blue is the first to figure out which pipe will work for them, by the simple expedient of having Blaine blow into various input pipes until Greg hears the wind coming through the output pipe. Blue never looks back, and their water wheel turns first. Your new Upper Class, and they're damn happy about it.