Welcome to the Adrenaline X guide at TV.com. This new NBC show is an action adventure reality show matching the world's elite extreme athlete in direct competition as they perform high-risk stunts. In each episode,athletes will face off on three challenges encompassing all the demands of a single extreme sport that will put the athletes to the limit and then perhaps one step on the. All the events will be set against the backdrop of some of the world's most scenic locations.moreless