Hosted by TJ Lavin, The Challenge: All Stars welcomes back some of the fiercest reality titans from the hit franchise's long history, including contestants who haven't competed in more than 20 years. With past relationships that run deep and competitive streaks that never die, they must overcome obstacles both in and out of the game to take home the win. Returning for a chance at the ultimate competition, the players face unprecedented, over-the-top challenges and vie for the grand prize.