The kids discover they are still school outcasts, Will tries to recruit more members, and Sue has a new enemy
Will is reluctant to allow the gang to perform a Britney Spears song. Finn and Rachel come to blows when Finn rejoins the football team.
Finn has an existential crisis when he sees the face of Jesus on his sandwich, the kids rally around Kurt, and Will raises the subject of theology
As the glee club works on a competitive duet assignment, Finn and Rachel conspire to help a new member win. A love triangle develops between Mike, Tina and Artie, and Puck gets himself in trouble.
Will decides that the Glee Club should perform The Rocky Horror Show for the school musical. Later, Emma's boyfriend confronts Will.
Kurt is encouraged by Blaine, a pupil from Dalton Academy, to stand up for himself but, when he does, there are unforeseen results.
A substitute teacher, played by Gwyneth Paltrow, fills in for Will when he is struck down by 'Monkey Flu', and wins over the whole New Directions clan
Rachel rallies the boys to stop Karofsky bullying Kurt, Kurt tells his dad that he wants to change schools to Dalton Academy, and there are a few surprise weddings.
The New Directions go head-to-head with Kurt and the Warblers in the sectionals competition, while Will ruffles some feathers in the choir
Will encourages the kids to be more charitable. Later, the teachers pick their secret Santas but one manipulative coach rigs the draw.
Karofsky gives the kids a hard time so Will comes up with a drastic solution. Sue asks the Cheerios to choose between Glee and cheerleading.
Finn sets his sights on an old flame, the kids organise a kissing booth to mark Valentine's Day, and Kurt learns some surprising news about Blaine.
Rachel launches a social comeback with Brittany's help, Sue takes her defeat badly, Quinn's love life is in a muddle, and Sam seeks Justin Bieber's advice.
Rachel throws a party at which the revellers play a game of spin the bottle, Will worries that he is getting out of touch, while Blaine and Rachel hit it off
Substitute teacher Holly Holliday - Gwyneth Paltrow - returns to tell the teens about sex education. Sue lets some Glee secrets slip to Kurt and Blaine.
The New Directions decide to write and perform their own songs, Quinn is hell-bent on getting Finn back, while Blaine and Kurt land a duet
The glee club members help another of McKinley's struggling societies to raise vital funds, but when Sue hears about the show of support she quickly moves to put the kibosh on it
Will teaches the kids a valuable lesson about self-acceptance through the music of Lady Gaga, and Rachel struggles with a life-altering decision
Sue revives the school newspaper so that she can plant disruptive rumours in it, the Glee Club discover some interesting gossip about Sam, and April returns.
Principal Figgins asks the New Directions to sing at the prom when the hired entertainment cancels without warning. The competition for prom king and queen heats up.
The New Directions work on their set list for Nationals - with a little help from Jessie St James. An unexpected loss rocks the world of one of McKinley's own.
In the series two finale, the Glee Club go to New York to compete in the Nationals. Will makes a tough decision, while Finn takes a daring shot at winning Rachel back.