Team members compete in an eating challenge.

Knight launches a full on attack to get inside Nany's head and ends up tearing the house and his own relationship with Jemmye apart. And a pending elimination may spell the end for one of the house's budding romances.

A trip into the Arena leaves two relationships in shambles. And after a trivia competition catapults challengers into the waters below, one team is forced to send members of their own alliance into elimination.

Three teams compete in the final challenge.

Tensions mount between Frank and Alton. Later, Alton asks to be sent into the arena.

Two teams face off in a diving competition.

Frank and Zach berate Sam for her poor performance in a challenge; a surprising romance takes shape.

The teams take desperate measures.

The final four teams travel to Namibia, a country in southwestern Africa.

Divorced exes Danny and Melinda struggle to work together and help shine a light on Knight and Jemmye's similarly fractured relationship. Major alliances are revealed and one team crumbles under the pressure of elimination.

Two new couplings start brewing in the the Challenge house, one of which threatens to break apart a team AND ruin an entire alliance. And other season continues to break down, with one member exploding on her teammates.

Cast members from The Real World's most memorable seasons come together for an all out battle for Real World supremacy, but an early twist could shake things up. Plus- a surprise hook up and a fight that involves the entire house.