TJ welcomes a pool of competitors who all have yet to win a championship, players get a chance to bank extra cash in Hole Control, and two housemates fight to avoid elimination in Fall Out.

The contenders go out on a limb in Ball Control, divides form in the house between U.S. and U.K. competitors, and one player is left surprised when their alliance doesn't keep them safe.

Sideways glances lead to a blowup between two contenders, the teammates try to break their losing streak during Control Tower, and the women concoct a plan for mutual self-preservation.

The players put their swimming endurance to the test, the housemates throw a coming-out party for Big T, and one contender resists the temptation to cheat on their significant other.

The next phase of the game approaches as the countdown clock nears zero, contenders split into pairs for Upside Down Whirled, and one player worries she's being targeted by an ally.

Head on down to your local bingo hall because we're playing BINGO - Challenge Style. Contenders get down and dirty, and tensions mount as they wrestle for power. Another Champ enters, hoping to end one Contender's dream.

In a move of desperation, one contender tries to prove his loyalty to his alliance by betraying his other friends; love is in the air as one of the couples take their relationship to a new level.

A rigorous and exhausting challenge sees one contender give their blood, sweat and tears for the win; an intense night out finds a contender in the firing line after another reaches their boiling point.

Cracks in the alliances begin to show themselves as one Contender works to flip the house vote. Multiple romantic scandals come to a head as one of the Contenders is confronted about being unfaithful.

The Contenders soar to new heights in a sky high challenge, with an outcome that makes one Contender question their alliance. A decorated Champion brings the heat in the elimination.

One contender is shocked when their so-called alliance nominates them for elimination.

The contenders fight for their lives high above the water! One Contender finds themselves on the outs with their alliance, while another attempts to change the power dynamic in the game. A long-awaited returning Champion shakes.

Chaos continues as a new alliance threatens to shift the power dynamics in the house.

The end of Chaos is near and with alliances on the brink of collapse, a grueling mini-final awaits.

The game intensifies as the contenders enter a new phase, leading to shocking new twists.

The remaining contenders fight to secure their chance to become the next Challenge Champion.

The final seven contenders enter the Final, where they must face the three levels of the game again.

The final six contenders compete for a place amongst the most esteemed competitors.

The battle is over and now it's time for phase four - closure. Maria Menounos returns to uncover what went down behind-the-scenes of this season's chaos. Why did the entire house target Big T and Melissa? Who regrets playing Jay and Michele's game? And why did Olivia throw her bestie Nurys under the bus? Plus, the Champs are in the building to weigh-in on everything - do they think Emanuel is a worthy enough to join their ranks?

The chaos continues on part 2 of the Challenge: Battle for a New Champion Reunion. There was no shortage of betrayals, backstabbing, and blindsiding this season... Have Big T and Melissa forgiven Corey? Is the Parents' Alliance dead? Michele, Callum, and other house flings reveal where they stand post-show, and a shocking, never-before-seen hookup two challengers thought they hid is revealed. Plus, Moriah spills on why she moved on from Bananas and what happened when she returned home.