Optimistic high school teacher Will Schuester tries to refuel his own passion while reinventing McKinley High's Glee Club and challenging a group of outcasts to realize their star potential. Going up against McKinley's cruel high school caste system and facing harsh criticism from everyone around him, Will is determined to prove them all wrong.
The Glee Club performs in front of the school for the first time and pushes their performance to the limits. When Quinn realizes Rachel's realizes her feelings for Finn, she goes to great lengths to keep her man. Meanwhile, Mr. Schuester's wife reveals some surprising news, forcing Will to figure out a new way to make ends meet.
Will forms the Acafellas, an all-male acapella vocal group, and spends more time building his own confidence than he does with the glee club. In Will's absence, the glee club decides to hire a well-known choreographer to help coach them to Nationals. Meanwhile, Mercedes is bitten by the love bug, but her feelings aren't reciprocated. When the Acafellas perform for the P.T.A., they get a surprise visit backstage from Josh Groban.
Kurt takes center stage when he tries out for the football team in order to impress his dad. Sandy and Sue join forces to carry out their plans for destroying the Glee Club. Meanwhile, Quinn and Finn's relationship is tested when they receive some life-changing news.
Will decides the glee club needs a replacement for Rachel now she has deserted to the musical. Finn works on her emotionally, but that's crossed when Will recruits musically gifted ex-student April Rhodes. She proves too ambitious and Will gets second thoughts.
Will challenges the kids to a healthy dose of competition with boys against girls in a mash-up showdown. Meanwhile, Terri takes a job as the school nurse, despite having no medical experience, to keep an eye on Will.
To cause dissention among the Glee Club members, Sue forces the students to compete against each other, but the real showdown happens when she and Will get called into the principal's office. Meanwhile, the Glee kids rally to support Quinn after some shocking news is revealed.
Inspired the by the students, Will composes a mash-up for a very special occasion. Meanwhile, in a shocking reversal of roles, McKinley High's cool kids are dethroned in an "icy" fashion, and Sue shows off her softer side.
When Artie's chances of traveling with the group to Regionals are in question, Will challenges the kids to step out of their comfort zones and experience life from a different point of view. Meanwhile, the Glee Club hosts its first "diva-off" between Kurt and Rachel, and Sue reveals a softer side.
Mr. Schuester splits the Glee Club into pairs to sing their favorite ballad, but when one kid gets sick, he's forced to step in and winds up in a sticky situation. Meanwhile, Finn and Quinn have to face the music when dinner with her parents goes awry.
Concerned that Sue is up to no good, Will pays a visit to an instructor of a competing Glee Club to see what information Sue may be leaking, which leads to the club getting a look at their hair-rising competition. Meanwhile, Kurt gives Rachel a makeover to impress Finn, but he may have ulterior motives.
When the Glee Club is left out of the yearbook because of budget cuts, everyone seems to be relieved that they won't have to suffer the ridicule of years past. Everyone except Rachel, that is, who wants her legacy cemented in print. Meanwhile, Quinn makes it her mission to be in the Cheerios yearbook photo, and Will and Terri's relationship is shaken to its core.
Sectionals is finally here for the Glee Club, but when Quinn's secret unravels, the club may not be able to recover in time to compete. Meanwhile, Sue's scheming hits an all-time high, and with Emma and Ken's marriage looming, Will makes a decision that could change his life forever.
Fresh off their monumental win at Sectionals, New Directions is on top of the world. With an extra spring in their step, they get to work on new numbers for Regionals. But when Rachel and Finn's budding romance hits a bump in the road after she becomes involved with a competitor, Jesse St. James, it threatens to derail the entire club. Mr. Schuester pays a visit to Shelby Corcoran, coach of Vocal Adrenaline, to confirm Jesse's motives. Meanwhile, Will is newly single, but is he ready to take his relationship with Emma to the next level? And to top it all off, Sue ...
Mr. Schuester is concerned that the girls in the glee club are being disrespected and bullied by the guys. Looking to Madonna and her musical message of equality as inspiration, he challenges the entire team to choose Madonna songs as their next assignment in the hopes that the girls embrace her strength, independence and confidence and that the guys will see the error of their misogynistic ways. The glee club takes the assignment to heart as they perform some of Madonna's greatest hits, including "Express Yourself" and "Like A Prayer." Meanwhile, Kurt and Mercedes ...
When Kurt sets his dad, Burt, up with an unexpected partner his plan for a nuclear family may backfire. Sue demands that the Cheerios! go on a crazy diet in preparation for a big interview with "Splits" magazine and April Rhodes returns to save Will and the glee club.
Mr. Schuester starts an investigation when a salacious list about members of the glee club circulates the halls of McKinley High. Meanwhile, Sue is mortified when a video of her performing the Olivia Newton-John classic "Physical" surfaces.
When a sore throat affects Rachel's singing voice, she goes into panic mode. Meanwhile, Kurt tries to change his persona to impress his father, and Puck makes a strategic move to elevate his social status.
In an episode directed by Emmy Award winner Joss Whedon, Mr. Schuester's former high school nemesis, Bryan Ryan, causes trouble for the glee club. Meanwhile, Rachel struggles with a life-long personal issue, and Artie's dreams take him on an adventure
The moment New Directions has been waiting for has finally arrived: it's time for Regionals! But when Sue pulls a fast one on Will and the glee clubbers, their chances at the title could be compromised. Meanwhile, Quinn's life changes forever.