The Challenge

Season 13 Episode 11 - Eps 11: Battle for a New Champion: My Own Worst Frenemy

Each Challenge pits hundreds of cast members from past seasons of reality shows against one another, dividing them into two separate teams based on various criteria, such as sex, which show they first appeared , whether or not they're veterans or rookies on the series, etc.. Both teams compete in many assignments in order to win prizes and progress in the game.