Believing the glee club members are becoming complacent ahead of Sectionals, Will pits the girls against the boys for a mash-up competition. Terri takes a job as the school nurse to stop Will becoming closer to Emma. With encouragement from Terri, Ken proposes to Emma, who reluctantly accepts. Terri gives the glee club pseudoephedrine tablets, enhancing their mash-up performances. Rachel and Finn feel guilty and confess, resulting in the competition being nullified, Terri being fired, and Sue being appointed co-director of the glee club. Quinn agrees to let Terri secretly adopt her baby, enabling her to continue faking her pregnancy.
Will, trying to find a twelfth member in the wake of Rachel’s defection to the school musical, recruits former glee club star April Rhodes. Finn flirts with Rachel continuously in an attempt to convince her to return, hoping that having her in the club will increase his chances of gaining a music scholarship. While Finn takes Rachel bowling, they kiss briefly after Rachel bowls a strike. Although Rachel is angry when she discovers that Quinn is pregnant, she ultimately rejoins the club. Will confesses to once having had a crush on April, and encourages her to sober up and pursue her dreams of performing on Broadway. The glee club performs at Invitationals, launching themselves onto the show choir competition circuit.