Edge of the Unknown with Jimmy Chin

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.

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.

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

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.

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

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.