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.

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 Kelly Anne 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 big misunderstanding back at the house.

Rivals Aneesa and Ashley attempt to get back in sync after their blow up; Katie tries to school rivals Adam and Steve on playing a more aggressive game; 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 paints a target on their backs; Adam questions his alliance.

The three pairs of rivals without a star consider more drastic strategies.

A rival pair seeks revenge to take back their star; one challenger threatens to quit the game.

The final four rival pairs compete in the Final Challenge; some rival pairs struggle.

Emotions run high as the final draws to a close; an unprecedented twist raises the stakes.