After Finn and Sam find an unconventional way of controlling their urges, a few glee club members pick up on the strategy and start using it too. But when Coach Beiste gets wind of what they are up to, the glee club has some explaining to do. Meanwhile, the Girls vs. Boys Tournament returns, Kurt meets an ally from a rival glee club, Puck and Artie join forces and coach Beast is on the verge of quitting her job.

New Directions heads to the big Sectionals competition to go head-to-head against the Warblers and the Hipsters. While trouble brews between some of the young couples, Emma and Carl grow closer.

A local football championship game takes place and the "Thriller" mash-up is performed during the halftime show. The Cheerios, McKinley High's cheerleading team, compete at Regionals.

Love is in the air at McKinley High when the glee club sets up a kissing booth for Valentine's Day. Things don't go as planned, however, and hearts end up getting broken.

With Sue Sylvester coaching Aural Intensity, Blaine and the Warblers’ dynamic set list and tough judges Tammy Jean Albertson and Sister Mary Constance, the kids of New Directions decide the only way to win Regionals is to write and perform their own original songs. Meanwhile, Quinn is hell-bent on getting Finn back and ruling McKinley once again.

The glee club learns about self-acceptance through the music of Lady Gaga; Lauren and Quinn compete for prom queen; Ms. Pillsbury faces with her issues; Rachel makes a life-changing decision; Santana schemes.

The school musical West Side Story is readied for performance, with Artie as lead director. Finn meets with a football recruiter, whom Coach Beiste gains as an admirer. Kurt and Blaine reach a new, physical stage in their relationship, as do Rachel and Finn in theirs.

In a special episode celebrating the music of Michael Jackson, the rivalry between New Directions and the Warblers intensifies en route to Regionals. Meanwhile, Kurt and Rachel receive news regarding their admissions process at NYADA, and things continue to heat up between Sam and Mercedes.

Things heat up as the New Directions go head-to-head with the Dalton Academy Warblers at Regionals.

A love triangle heats up among Marley, Jake and Ryder, and Blaine has a run-in with the Warblers.