Derrick Kosinski

Twenty-two Challenge All Stars return for a second chance at the ultimate competition and a $500,000 grand prize.

Twenty-four Challenge All-Stars reunite in Cancun to face their past and pursue a $500,000 grand prize; an old rivalry flares up between two players; TJ shocks everyone with an unexpected twist.

Twenty-four Challenge All Stars, all finalists or winners, arrive in Panama to face off; all eyes are on the notorious Wes and Veronica as leave both their enemies and friends wondering what trouble they have in store.

TJ surprises the challengers with a blast from the past and a new rivalry is born; the high-altitude "High Stakes" challenge leaves some players flying high, and others crashing down.

In the stifling Ycatan jungle, the final four pairs test the relationships they've built and are pushed to their physical, mental, and emotional limits as they race towards the prize.

TJ unveils a series of surprising twists as the challengers fight for their share of $500,000; several All Stars spelling skills prove highly questionable, risking their spot in the game.