They've supposedly fallen in love -- but what will happen when they meet in real life for the first time? Hosted by WWE superstar and former challenge competitor Mike "The Miz" Mizanin, this show features 10 of the fiercest champions from past Challenge seasons. The alumni go head to head against 10 celebrity athletes and entertainers in challenge-style competitions to determine who will reign supreme. Dirty 30 sparked the chaos, Vendettas burned everything to the ground, and Final Reckoning will mold the ashes into a new Challenge. All their recent betrayals, backstabbing and wrongdoings will come to a head, and they must find a way to work together with their foes.