Will Power (E06)

As he approaches the climax of his career, climber Will Gadd wants to do what many consider impossible: be the first to scale the Overhead Hazard route at Helmcken Falls, a 430-ft frozen waterfall in Canada known as the world’s hardest mixed club route in the world. But even with a lifetime of experience, Will fears for his safety as he climbs in subzero temperatures, dodges giant icicles and goes through a near-death experience. (National Geographic)