Immunity Challenge! The tribe walks in and Taj returns from Exile wearing her new shirt. She gets a round of applause from everyone and hugs from Douche even though he was so mad at her for her cowardly vote for Debbie and lack of integrity. Probst takes the necklace back from Douche, who makes Probst remove it from around his neck, much to Probst's annoyance. Everyone else just takes the necklace off and hands it to Probst, but not Douche. Never Douche. Probst explains the challenge: each contestant must race through an obstacle course, consisting of a sand pit to tunnel through, a balance beam, and a rope crawl, to a sequence of ten math symbols. The contestants must memorize as many as possible and race back through the course and write them down on a chalkboard with numbers on it. When all the symbols have been placed between all the numbers, the contestant must do the math and solve the equation. Judging by her math skills during the auction, I think it's safe to say that Debbie is right out of this one. In fact, they're all going to struggle if their performance when Probst asks them to do the math and say what their chances of winning this game will be if they win immunity is any clue, as they just stand there looking at Probst blankly for a while until Taj and J.T. finally come up with the right answer.

The contestants line up, and Probst calls go. J.T. is the first to try to crawl through his tunnel, and he gets stuck halfway through and has to use his elbows to dig his way out. Taj tries next, and also gets stuck. J.T. makes it through his tunnel, past the balance beam, and under the rope crawl effortlessly and starts trying to memorize. While he's up there, Debbie makes it through the sand pit and a boob makes it out of her top. As Douche makes it through his tunnel, J.T. is back at the start, writing down the symbols. Taj and Stephen finally escape their tunnels, leaving skinny little Erinn as the only one still stuck at the start. Stephen gets stuck at the balance beam section, falling off his beam over and over again, while J.T. heads back out to memorize the rest of the symbols. Meanwhile, Debbie is on her way back to her board and Douche and Taj are at the memorization station.