Bear Grylls takes some of today's biggest stars on a 48-hour journey through breathtaking and often unforgiving wilderness. From Norway's glacial terrain to Wales' Eryri mountains, each adventure pushes guests to their limits with glacier crossings, canyon descents, desert treks, and even a freefall from 11,000 feet. Along the way, thrilling action and revealing conversations uncover a side of these celebrities rarely seen.