Overview
"Vitamin D" is the sixth episode of the American television series Glee. The episode premiered on the Fox network on October 7, 2009. It was written by series creator Ryan Murphy and directed by Elodie Keene. In the episode, glee club director Will Schuester (Matthew Morrison) pits the male and female club members against each other for a mash-up competition. Will's wife Terri (Jessalyn Gilsig) takes a job as the school nurse to stop him becoming closer to guidance counsellor Emma Pillsbury (Jayma Mays), but is fired after giving the students performance-enhancing pseudoephedrine tablets.
The episode features mash-up covers of "It's My Life" by Bon Jovi and "Confessions Part II" by Usher, and "Halo" by Beyoncé Knowles and "Walking on Sunshine" by Katrina and the Waves. Both tracks were released as singles, available for digital download. "Vitamin D" was watched by 7.30 million US viewers, and received generally positive reviews from critics. Performances by Morrison, Mays and Jane Lynch as cheerleading coach Sue Sylvester attracted praise, as did the staging of the musical mash-ups. However, Aly Semigran of MTV and Mandi Bierly of Entertainment Weekly both noted critically that dramatic storylines in the episode dominated over the musical performances.
Plot
Believing the glee club members are becoming complacent ahead of the forthcoming sectionals, director Will Schuester (Matthew Morrison) divides the club into boys against girls for a mash-up competition. Cheerleading coach Sue Sylvester (Jane Lynch) observes that head cheerleader Quinn Fabray's (Dianna Agron) performance standards are slipping. When Quinn blames her tiredness on her glee club participation, Sue renews her resolve to destroy the club, planning to sabotage Will's personal life.
Sue tells Will's wife Terri Schuester (Jessalyn Gilsig) that guidance counselor Emma Pillsbury (Jayma Mays) has romantic feelings for Will. Determined to stay close to her husband, Terri takes a job as the school nurse, despite having no medical qualifications. She encourages Emma's boyfriend, football coach Ken Tanaka (Patrick Gallagher) to propose to her, which he does. After asking Will if there is any reason she should not marry Ken, and being warned off Will by Terri, Emma accepts his proposal. Terri is still hiding the fact she experienced a hysterical pregnancy from Will, and upon realizing how much her life is changing due to her pregnancy, Quinn agrees to let Terri secretly adopt her baby.
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