Eight survivalists struggle to endure 21 days in extreme locations alone. With no one to help, their success depends on their own abilities and will to survive.
Two new survivalists begin their 21-day solo challenge. Terra makes a risky decision, while Jamie tries to overcome his disappointment in Peru.
Shanika and James begin their 21-day solo challenge. Ravaged by insects, Terra considers hiking back for the fire starter.
Jamie fears he might have a parasite in his bladder, Fernando switches hunting strategy and James meets aggressive hippos in his new water source.
Cheeny stalks another giant catfish. Meanwhile, a Fer de Lance snake gets the best of Kaila and Fernando battles his own doubts.
The hardships continue as a painful injury jeopardizes Shanika's challenge. Meanwhile, Fernando's persistence brings him a huge win.
