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The madness, it spirals out of control. Sue is still concerned that Glee Club is imperiling her chances to win a national championship. She decides that if she can't destroy the club, she'll destroy Will. And her plan is to tell Terri that Will is having an affair with Emma, or is on the way to an affair. So Terri decides to keep an eye on Will by getting a job at the school -- as the school nurse (a job that's open because Sue pushed the elderly school nurse down the stairs). This leads to all kind of tension around the school. Emma and Will can no longer stare flirtatiously into each other's eyes, and Will feels smothered by Terri's constant presence. And then Terri ups the ante by convincing Ken Tanaka to propose to Emma. And she accepts, on the condition that they don't live together, socialize together, or tell a single person that they're married. Except that Emma tells Will, clearly hoping that he would beg her not to marry Ken. But he doesn't, and we're all sad.
Meanwhile, Will has noticed that the Glee Club kids have grown complacent after they learned that they have weak competition at sectionals. Inspired by Sue (!), he decides to motivate them by pitting the boys and girls in a competition against each other. Finn is feeling overwhelmed and exhausted, so Puck encourages him to visit the school nurse to get a little nap time. Unfortunately, Terri prefers to treat listlessnes with over-the-counter cough medicine, giving us a glimpse of what Finn would be like as a meth-head. He shares the medicinal bounty with the rest of the boys, and they put together an entertaining but high-speed mash-up of "It's My Life" and "Confessions." The girls realize they have to step up to win the competition, so they also resort to doping, and perform a very energetic mash-up of "Halo" and "Walking on Sunshine." In the end, Principal Figgins catches on to Terri's drug pushing and fires her as nurse. But Figgins also decides that Will's failure to notice that all his kids were high means he can't be trusted to have sole stewardship of Glee Club. So he appoints Sue as co-director of Glee. I know!
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