Glee: Vitamin D

"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.