Watch I Shouldn't Be Alive Season 4 Episode 15 Online

50 year-old Australian mountaineer Lincoln Hall attempted to climb Everest in 1984 but didn't reach the summit. Now, 22 years later, he has a second chance. Despite his age, Lincoln fulfils his lifelong dream, but on the descent is struck by a deadly form of altitude sickness known as a cerebral oedema. Unable to climb and suffering from hypothermia, Lincoln is left for dead at 28,000ft. His survival is nothing short of a miracle.