When a third survivalist crashes the challenge, tension and jealousy are just as threatening as the piranha and jaguars of the Ecuadorian rainforest. Claims that there's more going on than just survival puts everyone's challenge at risk.

In South Africa's Limpopo Basin, elite survivalists Matt Wright and Gary Golding must protect novice survivalists and super-fans attorney Molly Jansen and dog sledder Blair Braverman first as separate teams for 10 days then merging on Day 11 while dealing with spitting cobras, territorial elephants and a violent last-minute storm. Being unused to the unyielding heat, Blair was forced to tap out on Day 14.