Still in Mendoza area, the contestants, now down to the Final Five with one woman remaining, face additional physical and mental challenges as they compete in their next missions.
Divided into the Smart and Dumb teams, the competitors have to chase down clues, based on Argentine history, in several places in either the Plaza Italia or the Plaza Mendoza, perform some mathematical equations and remember the results to earn more money for the pot.
The next day, they take a LAN flight to Buenos Aires, where they stay at the Hotel InterContinental. For their second challenge, they gather at a train station, where they have to pick the player they trust the most, then quiz each other on the results. They must each answer correctly to see members of their families who are arriving by train. If they are correct, the train doors will open and allow the family members to descend, else the train will continue with the doors closed. The tension for each player as they wait for the doors to open, or not, is catching. Finally, all the players greet their families and enjoy a dinner together.
The players spend the next day with their loved ones. The sole woman plots with her mother to throw the coming quiz and return home with her. The players take the quiz and gather at the historic Manzana de las Luces, or Block of Lights, a former Jesuit monastery, for the results. At the end, the player changes her mind. She survives the quiz, but a fellow player does not. He leaves with his wife.
And now there are four, the Final Four.
Where will they go next? And have you guess the identity of The Mole?