In a unique four-person challenge, a lion attack survivor returns to Africa to face her fears. Surrounded by lions, crocodiles and cape buffalo, the tribe of four struggles against constant threats and each other as they try to survive in a kill zone

Superfans Molly and Nate are dropped deep in the Amazon rainforest, a place that's taken down the best of the best. Nate and Molly lean on lessons learned from their couches to push through torrential rain, relentless bugs, and sleep deprivation.