Alex Honnold became the world’s most famous alpinist when he climbed Yosemite’s granite wall without a rope. But how did Alex prepare to do the impossible? He and his friend Tommy Caldwell went to Morocco and pushed their limits on equally huge walls, culminating with Alex’s ropeless climb up the hardest route. This is Alex’s tireless, grinding process to transform a dream into reality.

Big mountain skier Angel Collinson boasts the most important achievements in the sport, from first place trophies to best lines ridden. Seeking to cross new limits, she says yes to riding some of the steepest spines in Alaska for a new film. But when she loses control of her skis in the middle of a high-speed descent, Angel starts falling down a 1000-ft slope—and only stops at the bottom.

In 2013, elite Kayaker Gerd Serrasolses was on a mission in Chiapas, Mexico, when he almost drowned in an unexpected eddy vortex. After surviving 3 ½ minutes underwater and being revived by his teammates, Gerd shares how the accident continues to shape his approach to balancing risks as a new father and World Champion.

Legendary climber Conrad Anker and his mentee David Lama want to be the first to summit Lunag Ri, the tallest unclimbed peak in the Himalayas. As they struggle on the side of the mountain, at an altitude of 20,000 feet and glacial temperatures, Conrad grasps for air and suddenly feels a pain in his chest. He realizes he is having a heart attack in one of the most inhospitable places on Earth.

In 2016, elite snowboarder Travis Rice was riding in the backcountry of Alaska, film crew in tow, when the mountain snow spider webbed around him, catapulting Rice into an avalanche. Looking back, Travis reflects on the near-fatal mistake that forced him into unknown territory, sharing how the traumatic event has since shaped his approach to his sport and his life in general.