"The Amazing Race" continued the race in Argentina in its second leg, where the remaining teams must first head to Cafayate Town Square to get a clue delivered by a postman. Rachel and Dave, who won in the first leg, took off first but they lost their lead as they had to wait for quite a long time before the postman arrived.
The clue directed them to Detour, which was between "Boil My Water" or "Light My Fire". In the former, teams had to assemble a solar kitchen and boil a teakettle of water. In the latter, teams had to gather firewood and clay at a nearby river, load it onto a donkey, and then deliver it to a local pottery workshop. Almost all teams picked "Boil My Water", except Art and JJ who opted for "Light My Fire".
Married clowns Dave and Cherie had trouble with the challenge until they noticed a picture on the side of the solar panel box which could help them. Mark and Bopper finished the challenge first while other teams were still waiting the water to boil.
After completing the Detour, the teams took an 18-hour bus trip to Buenos Aires to find the Mercado de Hacienda de Liniers. The teams were separated in three buses, but the second bus to leave had its window broken and had to stop. While Dave & Cherie, Vanessa & Ralph, Elliot & Andrew, and Joey & Danny were waiting for the window to be fixed, other teams in the third bus passed them.
Once arriving at their destination, they faced Roadblock which told them to go to a cattle auction, where they had to calculate the average weight of a head of cattle in the pen before the auctioneer moved onto another pen. Rachel and JJ teamed up and came up with the correct answer first. Meanwhile, Rachel R. freaked out because she's not good at math, but Mark decided that they could work together and it worked.
The teams now headed to the pit stop which was at El Gomero. Rachel and Dave once again finished first and won a trip to Grenada. Art and JJ arrived second, followed by Bopper and Mark. Rachel R. and Brendon arrived third, but the former had a breakdown on their way to the pit stop as she thought she's not good enough for Brendon.
Arriving later in respective order were Kerri & Stacy, Nary & Jamie, Vanessa & Ralph, Joey & Danny, and Elliot & Andrew. The clowns, David and Cherie, were the last team to arrive and got eliminated. They walked away with their clown noses on.