The perfect algorithm has been replaced with a much simple alternative: everyone for themselves. As the game turns from partners to individual, some people feel pretty vulnerable with no protection, others feel that sticking with their original alliance is the best path forward. Some players are still not qualified for TJ's final.

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A sub-alliance featuring this season's richest players begins to emerge. Two rivals are forced to play together, thanks to the algorithm.

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Maybe loyalty isn't all it's cracked up to be. Friendships are tested as divisions between, and within, alliances begin to form. Will relationships outside the show influence relationships inside?

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As we get deeper into the competition, alliances are tested and some people are considering switching sides.

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The Challenge does Trivia! it's one of our favorite Challenges although Tim isn't a fan of the format. Alliances begin to crumble as old grudges surface.

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Shows are still banding together, but the show alliances are pretty tenuous. In this episode, we see some people willing to bend or break their alliances to make it further in the show. Some love drama and conflict, some athletic differences, and general shenanigans put the rest of the season in question.

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The algorithm works its magic and sets all the Challengers up with new pairs. Some are happy about the switch, others are not. The Challengers get their first lesson about how physically intense and sometimes dangerous the challenges are. Some alliances are showing cracks pretty early.

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This season of All Stars wraps and new champions are crowned.

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The Challenge moves from MTV to CBS! In this premiere episode, contestants from Big Brother, Survivor, Love Island, and The Amazing Race join TJ Lavin to compete for $500,000.

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The Challenge is starting a new era, this time on CBS. Casts from Survivor, Big Brother, Love Island, and The Amazing Race all come together to battle it out. As with the MTV version, TJ Lavin hosts. None of our other MTV favorites are on this version, but we run down the cast list anyway.

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