In this high octane, no holds barred episode, extreme survival expert Bear Grylls goes to Canada's snow-covered Pacific Coast mountain range to explore incredible real life survival stories in this hostile, unforgiving terrain. Bear throws himself into mini-avalanches, jumps into freezing cold rivers and leaps from a cliff ledge into a tree top as he retraces the steps of three remarkable men — Sébastien Boucher, Eric LeMarque and Charles Horton — who all found themselves in the ultimate battle for survival. They faced freezing temperatures, life threatening injuries, severe dehydration and extreme exhaustion but showed courage, ingenuity and sheer determination to escape from hell.