With $331,000 in the final pot, the Final Four remain in Buenos Aires for the next two missions.
In an abandoned mill on the outskirts of Buenos Aires, the players separate into two teams. One of each team will handle a small camera, which shows everything in reverse, and cannot speak; the other will handle an obstacle course wearing goggles that show what the camera sees. The first game is a kids game of fitting puzzle pieces into the right holes of a plastic box. Suspicions arise and mount wuth the next game, when the second players must fill teacups without spilling a drop.
The last and most heart-stopping is when the players gather on the roof of a building and must cross a plank stretched between that roof and the one across the street in a timed sequence. Again, suspicous minds note every fumble, every delay.
After dinner and a stay at the Hotel Intercontinental, the next evening the players meet again at the mill to be locked behind individual doors into cells where they must form a doublet (trasnforming one letter at at time) to change the word Cell into Mole. At stake is the final exemption of the game. Mark finishes first, but Paul has trouble and finishes last.
Winning the exemption, and the role of sniper in the next challenge, a paintball fight, Mark notes he's never played and fires wildly at first. Mark can't get Paul as he dodges and races to safety, but he does mark Nicole and Craig.
After a candlelit dinner the next night, the four players take the quiz. Paul is nervous, but all are shocked by his execution and departure from the game.
Only three are left, one of which is the Mole. Have you guessed who it is?