Eight survivalists tackle 21 days in locations across the globe all alone.

Two new survivalists begin their 21-day solo challenge.

Shanika and James begin their 21-day solo challenge.

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Cheeny stalks another giant catfish, a Fer de Lance gets the best of Kaila and Fernando battles his own doubts.

A painful injury jeopardizes Shanika's challenge while Fernando's persistence brings him a huge win.

Hypothermic, starving and dehydrated after surviving 21 days solo, Cheeny, Kaila and Fernando brace for their difficult extractions.