 " 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 <unk> 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 ( <unk> <unk> ) takes a job as the school nurse to stop him becoming closer to guidance <unk> Emma Pillsbury ( Jayma Mays ) , but is fired after giving the students performance @-@ enhancing pseudoephedrine tablets . 
