Edge of the Unknown with Jimmy Chin

Kayaking legends Ben Stookesberry and Chris Korbuic accumulate together hundreds of first descents in the most dangerous rapids in the world; but the Lukuga River, in Congo, has left a particular mark on them.

Jimmy Chin, who recounts his own story of how a class four avalanche transformed the way he approaches his work and life.

Justine Dupont prepares to ride big waves, but she has to face down fear and risk.

Will Gadd, a legendary climber who would stop at nothing to accomplish his goal of being the first to climb Helmcken Falls, a 430-foot frozen waterfall in British Columbia.

Travis Rice, a big-mountain freeride snowboarder, filmmaker and designer who survived a near-fatal avalanche while riding in the backcountry of Alaska.

Conrad Anker, a renowned mountaineer and professional climber who suffered a heart attack while at 20,000 feet on Lunag Ri, the tallest unclimbed peak in the Himalayas.

Gerd Serrasolses, a kayaker who was knocked unconscious after falling down a 50-foot waterfall while filming in Chiapas, Mexico.

Angel Collinson, a big mountain skier who survived an epic fall that sent her tumbling 1,000 feet down the side of a mountain in Alaska.

Alex Honnold, professional rock climber, who was pushed to his physical and mental limits while climbing the Atlas Mountains of Morocco with his close friend and world-class climber Tommy Caldwell.