1. Episode I: Into the Void

Two elite snowboarders and a skier travel to Alaska’s Glacier Bay National Park to attempt an unprecedented descent of Mount Bertha amid hazardous winter weather. But when a whiteout exacerbates the already treacherous conditions, the entire mission is thrown into doubt.

2. Episode II: Raging Torrent

Three accomplished whitewater kayakers venture deep within Ecuador’s vast Llanganates National Park to attempt the first whitewater descent of the Chalupas River. With no map, guide, and only one point of emergency access to the outside world, the athletes must rely on one another to navigate the river’s uncompromising terrain.

4. Episode IV: The Great Unknown

Two professional surfers travel to Africa’s West Coast in hopes of establishing its raw, untouched coastline as the next big wave surf location. Forced to be entirely self-sufficient due to the remote nature of their locale, the team tracks the swell, monitors the conditions, and dodges unexpected storms in search of untapped, world-class breaks.