Total Drama: Revenge of the Island

Season 1, Episode 7: A Mine is a Terrible Thing to Waste

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The two teams are sent into an abandoned mine, where one teammate takes charge of their team, and someone's disorder gets more out of hand. Someone throws the challenge to save his old team, leading to his elimination. Meanwhile, an old contestant falls in love with a new contestant and gives her a special reward, which leads to her quitting the competition and a former intern returning to their former team in their place as a contestant.