In the first days of the challenge, the participants realize that nothing will come easy for them. The blisters on Gi's feet condition the good progress of the duo with Joedson; conflict between Sati and Rene breaks out.

The competitors begin feeling the effects of malnourishment after four days in the savanna; Tony's mental exhaustion sets in and a lack of food leaves Joedson feeling weak; two competitors make a drastic decision about their future in the challenge.

This is the ultimate test of survival of the fittest. What happens when you put a man and a woman without clothes in one of the most remote areas of the world?

Léti, Érika and Itamar face their most challenging moment without energy or harmony in the group; Gi and Joedson play their last cards before they run out of energy; Sati and Rene get a game-changing surprise.

René struggles to lead and feed his group. Sati has an accident.