The Challenge: All Stars

Twenty-six All Star competitors are paired up with their greatest enemy from seasons past. As bad blood resurfaces for some, the Rivals quickly learn that to win their share of the $300,000 grand prize, they must be able to work together to survive.

With the four coveted Stars claimed, the nine remaining Rival pairs without a star are left to figure out how to take possession of one for themselves. At the next challenge, the Rivals are faced with one of their greatest fears: heights.

Tension continues to brew between Rivals KellyAnne and Sylvia. Adam puts himself and his partner Steve's Star at risk after coming down with a flu. At the challenge, another Rival pair is divided, leading to a big misunderstanding back at the house.

Rivals Aneesa and Ashley attempt to get back in sync after their blow up, while Katie tries to school Rivals Adam and Steve on playing a more aggressive game. Also, the pressure is on to free up a Star, tempting the winning team to make a big move.

TJ puts a Rivals spin on his favorite challenge of the season: trivia. Tempers flare between two Rival pairs when one challenger is caught supporting a strategy to throw in their real life best friend into the Jungle for possible elimination.

A Star is up for grabs, and the six Rival pairs without one fight tooth and nail in the first ever Star Challenge for their ticket to the Final. An unexpected outcome from the daily challenge causes the house to scramble like never before.

Accusations fly as several Rival pairs try to figure out who is controlling the game behind the scenes. Shane targets an alliance member that he feels is threatening his position in the game and friendship with his long-time BFF, Veronica.

Nany worries that Turbo's attitude around the house paints a bigger target on their backs, Adam begins to question one of his alliance members, and Veronica continues to take issue with her BFF Shane's lack of allegiance to her side of the house.

With the Final suspected to be right around the corner, the three pairs of Rivals without a Star consider more drastic strategies to earn their ticket to the Final. Meanwhile, one team fears their Star is being targeted in the next elimination.

One Rival pair seeks revenge to take back their Star from one of the four Star holding pairs after it was stolen in the previous elimination, and one Challenger threatens to quit the game when tension with their Rival reaches an all-time high.

The final four Rival pairs compete in the Final Challenge. With a life-changing amount of money on the line, some Rival pairs struggle to excel past their differences, while others fully regress back into their old ways with each other.

Emotions run high as the Final draws to a close, and the final four Rival pairs continue to fight for the last remaining Stars. At the finish line, an unprecedented twist on a controversial decision raises the stakes for the winning Rival pair.