E1 - Welcome to the Jungle

Aired: June 22, 2011

Twenty-eight Challenge competitors arrive in Costa Rica only to find out that they will be teamed up with their biggest rivals. And a fight on night two sends one Challenger home early.

E2 - Through The Looking Glass

Aired: June 29, 2011

On the first men's elimination day, the competition is crushing, and everyone is surprised at who ends up fighting for their lives in the Jungle. Jonna and Camilla have it out, but it's Jasmine who takes the fight to the next level.

E3 - Underdog Day Afternoon

Aired: July 06, 2011

A strong team struggles on the girls' elimination day.

E4 - D-DAY

Aired: July 13, 2011

The guys plot to send CT home, while Laurel and Mandi vie for his attention. Also: Kenny worries that he's lost his competitive edge.

E5 - Ill Communication

Aired: July 20, 2011

Things get heated between teammates Jasmine and Jonna, and a blowout between the girls changes the game. Meanwhile, Adam pursues Jenn.

E6 - Blow Up

Aired: July 27, 2011

Evan considers throwing a challenge as part of the guys' plan to get rid of CT. Meanwhile, CT finds himself in the middle of a love triangle with Mandi and Laurel.

E7 - Blood on the Dance Floor

Aired: August 03, 2011

One alliance begins to crumble after a brawl between Jenn and Cara Maria. Later, a surprise twist changes the game.

E8 - Cry for Me, Argentina

Aired: August 10, 2011

Some players crack under pressure as the final challenge approaches; Laurel defends Cara Maria after Wes and Paula drive her to tears.

E9 - The Storm Before the Storm

Aired: August 17, 2011

Two strong male teams fight tooth and nail in "T-Bone," the last elimination of the season. A clue sends the remaining twelve Challengers off to another destination, where they begin the toughest Final in Challenge history.

E10 - At the End of the World

Aired: August 24, 2011

With the Final underway, teams thrive or fail based on their ability to work together. One male team and one female team will claim the title of Challenge champions.

E11 - Reunion

Aired: August 31, 2011

The "Rivals" cast reunites and dishes about what went down on the 21st season.

E12 - The S#!@ They Should Have Shown

Aired: September 07, 2011

Outtakes and previously unseen footage for the 21st season.