High school teacher Will Schuester tries to reinvent McKinley High School's Glee Club and get its outcast members to realize their star potential.
Glee Club performs in front of the school for the first time and surprises everyone in the audience. Meanwhile, Rachel realizes her feelings for Finn.
Will forms the Acafellas, an all-male a cappella vocal group, spending more time building his own confidence and more time away from Glee Club.
Kurt tries out for the football team in order to impress his dad. Sandy and Sue join forces to carry out their plans for destroying Glee Club.
Will thinks Glee Club desperately needs more of an edge, so he brings in his former classmate, April Rhodes, to spice things up.
Will challenges the kids to a mash-up showdown. Meanwhile, Terri takes a job as the school nurse and hands out pills like they're candy.
Sue tries to cause dissension among the Glee Club members, but the real showdown begins when she and Will get called into the principal's office.
Inspired by the students, Will composes a mash-up for a very special occasion. Meanwhile, in a shocking reversal of roles, Sue shows her softer side.
When Artie may not be able to travel with the group to Sectionals, Will challenges the kids to experience life from a different point of view.
Will splits Glee Club into pairs to sing ballads, but when one kid gets sick, Will is forced to step in and winds up in a sticky situation.
Concerned that Sue is up to no good, Will pays a visit to an instructor of a competing glee club to see what information she might be leaking.
When Glee Club is left out of the yearbook because of budget cuts, everyone's relieved that they won't have to suffer the ridicule of years past.
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.
With an extra spring in their step, Glee Club works on new numbers for Regionals, but their efforts are undermined by Rachel and Finn's rocky romance.
Concerned that the Glee Club girls are being bullied by the guys, Mr. Schuester challenges the kids to choose Madonna songs as their next assignment.
When Kurt sets his dad, Burt, up with an unexpected partner, his plan for a nuclear family may backfire.
Mr. Schuester starts an investigation when a salacious list about members of the Glee Club circulates the halls of McKinley High.
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.
In an episode directed by Emmy Award winner Joss Whedon, Mr. Schuester's former high school nemesis, Bryan Ryan, causes trouble for Glee Club.
Mr. Schuester encourages the Glee Club kids to express themselves using the music of Lady Gaga. Meanwhile, Tina embraces her inner Goth.
Glee Club gets some bad news. Meanwhile, Mercedes helps Quinn connect with her funky side, and Will gets revenge on Sue.
The moment New Directions has been waiting for has arrived: Regionals! But when Sue pulls a fast one, their chances at the title could be compromised.
New faces challenge some Glee Club veterans during auditions, while new and old relationships leave some feeling happy -- and others sad.
Brittany has hallucinations while at the dentist and channels her inner Britney Spears. Rachel fears her relationship with Finn could be in peril.
Finn thinks he sees the face of Jesus in a grilled cheese sandwich, and random events have the members of the Glee Club questioning religion and God.
Will Schuester's duet challenge, with a free meal for the winners, causes some relationship issues between the members of the club.
Will assigns the Glee Club to perform "The Rocky Horror Picture Show" for the school musical after learning of Emma's newfound love for the cult film.
Will Schuester hosts the second annual Boys vs. Girls competition, while Puck finally gets out of juvenile detention.
A substitute teacher takes over for an ill Will Schuester and wows the group with her unconventional teaching methods.
Sue's mother comes to visit, bringing some surprising revelations. Sam tells Quinn he's in love with her and offers her a promise ring.
New Directions faces fierce competition against the Hipsters and Warblers. Finn and Rachel and Emma and Carl experience relationship trouble.
Finn tries to get everyone at McKinley High into the holiday spirit. Sue paints herself up as the Grinch to steal back presents.
A huge halftime performance is planned during the championship football game at McKinley High. Sue's Cheerios have trouble at the Regionals.
Will gives the New Directions their next assignment: love songs! Finn and Quinn begin an affair, while Blaine sings a love song to his crush.
Sue is depressed since her loss at Regionals. Brittany starts a new fashion trend at school to the dismay of Rachel who showed her what to wear.
Mr. Schuester has the Glee Club perform a song about underage drinking, but the message might lose impact when they come to school with hangovers.
Holly Holliday returns to McKinley High to teach sex education to the students. Puck and Lauren join the celibacy club.
New Directions wants to get an edge at the Regionals and decides to use original songs. Blaine wants to try a new strategy during Regionals.
Mr. Schuester tries to come up with ways to raise money to send the kids to the Nationals. Sandy forms "the Heckling Club" with eyes on the glee team.
Finn accidentally breaks Rachel's nose during dance rehearsals. The campaign to become prom queen heats up between the girls.
Brittany's new Internet talk show spreads like wildfire around the school. April returns to McKinley High after an unsuccessful attempt on Broadway.
New Directions are asked to perform at the prom after Air Supply cancels. The students scramble to get dates for the prom.
Coach Sylvester tries to sabotage the New Directions' trip to New York. The Glee Club performs songs at a funeral. Finn has bad news for Quinn.
The Glee Club gets ready to perform at the Nationals in New York. Finn and Rachel have an emotional moment on stage during the competition.
The New Directions clan returns after a devastating loss at Nationals, so Mr. Schuester assigns them a project to get them back on track.
Shelby Corcoran returns to the halls of McKinley High. Meanwhile, Mr. Schuester initiates a boot camp for some of the members of New Directions.
Rusty and Rose Pillsbury pay Emma a visit and we get a sneak peek into her deep-rooted issues. Meanwhile, Mike Chang struggles with his grades.
Rory Flanagan, a new foreign exchange student, enrolls at McKinley and crashes with Brittany, who thinks he's a leprechaun.
Under Artie's directorial leadership, the kids prepare to perform the school musical "West Side Story." Meanwhile, Finn meets with a recruiter.
Sue starts a smear campaign to take down her biggest competitor for the congressional seat.
As the race for McKinley High president comes to an end, someone is caught trying to fix the results.
In an attempt to recruit a few more members, Finn tracks down former teammate Sam Evans and convinces him to come back to the glee club.
When New Directions is asked to perform at two different events -- on the same day, at the same time -- they have a tough decision to make.
When Will tries to plan a special surprise for Emma, he enlists the glee club to help him sweep her off her feet.
The rivalry between New Directions and the Warblers intensifies en route to Regionals, and Kurt and Rachel receive news about NYADA.
Will assigns the glee club a Spanish singing assignment and enlists the help of his musically inclined night school teacher.
In honor of Valentine's Day, Will challenges New Directions to find and perform the world's greatest love songs.
Things heat up as New Directions goes head-to-head with the Dalton Academy Warblers at Regionals.
Much to Blaine's chagrin, his big-shot Hollywood actor brother, Cooper, comes to visit.
New Directions pays homage to the movie Saturday Night Fever by grooving to disco-infused dance numbers.
The glee club pays homage to a true icon when they cover Whitney Houston's greatest hits. Emma and Will are one step closer to their dream wedding.
Rachel and Kurt finally get their chance to audition for the New York Academy of the Dramatic Arts.
Brittany goes into high gear as class president to spearhead the prom. Then, after nominations are announced, the kids kick into campaign mode.
When Tina bumps her head, the world of New Directions is turned upside down in her eyes.
Sue and the Glee girls tend to Mercedes, who has a nasty case of food poisoning. Will drafts Tina and a nervous, reluctant Quinn to sub for Mercedes.
Graduation is finally here, and McKinley High's class of 2012 looks to the past and present while contemplating the future.
In the season premiere, the members of New Directions compete to become the next star of the glee club, and a fresh crop of students is introduced.
Brittany Pierce is in a funk and turns to Britney Spears' music for inspiration. Meanwhile, Rachel struggles to adjust to life in New York City.
The campaign showdown begins when Brittany and Blaine go head-to-head for student council president. Meanwhile, Kurt lands his dream internship.
In New York City, unexpected visitors catch Rachel and Kurt off guard. Meanwhile, Santana and Brittany adjust to their long-distance relationship.
As auditions for the school production of "Grease" get under way, Marley, Jake, Kitty and football player Ryder compete for the lead roles.
Rachel and Kurt pay a visit to Lima as the glee club launches its production of "Grease." Meanwhile, Santana comes back to lend a helping hand.
Marley, Jake and Ryder find themselves in the midst of a love triangle. Meanwhile, Blaine has a run-in with the Warblers.
Some McKinley alumni give New Directions advice about Sectionals. Elsewhere, Rachel and Kurt have a nontraditional Thanksgiving dinner.
As New Directions regroups after Sectionals, Finn ponders his future with the club. Meanwhile, Kurt gets a shot at redemption with a second audition.
As 2012 draws to a close, Sam and Brittany live life to the fullest before the Mayan apocalypse. Meanwhile, Kurt has a Christmas he'll never forget.
The glee club girls organize a Sadie Hawkins dance at McKinley High. Meanwhile, Sam looks for evidence that the Warblers cheated at Sectionals.
The glee club puts together a calendar photo shoot for a fundraiser. Meanwhile, a part in a student art film poses a moral dilemma for Rachel.
Finn challenges the glee club members to find their inner powerhouses for "Diva Week." Meanwhile, Emma prepares for her upcoming wedding.
Will and Emma tie the knot on Valentine's Day, with current and former members of New Directions reuniting in Lima to celebrate.
As everyone recovers from Will and Emma's wedding, the glee club members are tasked with performing their favorite movie songs.
The students give Will and Finn an assignment to work out the tension between them. Meanwhile, Santana is suspicious about Brody's side job.
The members of New Directions perform songs that they're ordinarily too embarrassed to admit that they love.
As the members of New Directions prepare for Regionals, an unthinkable event occurs and puts matters into perspective.
New Directions gets ready for Regionals, where "Dreams" will be the theme. Meanwhile, Rachel auditions for a Broadway revival of "Funny Girl."
When the power goes out at McKinley High, the members of New Directions "unplug" and perform acoustic numbers.
The members of New Directions perform Stevie Wonder's greatest hits. Meanwhile, Artie receives news that could affect his future.
It's time for Regionals, and the glee club is more determined than ever to advance to Nationals. Meanwhile, Brittany returns with a new attitude.
The members of New Directions take on an homage to the Beatles, singing classics like "Yesterday," "Drive My Car" and "A Hard Day's Night."
Beatlemania continues at McKinley, and it's voting time for prom queen and king. But when Tina gets nominated, her attitude alienates her supporters.
The McKinley family of the past and present celebrate the life of Finn Hudson with musical performances like "Seasons of Love" and "Fire & Rain."
The members of New Directions get out of their comfort zone with the assignment of deciding whether they're more of a Katy Perry or a Lady Gaga.
The glee club learns to twerk, while Marley discovers Jake and Bree's relationship and Rachel tries to convince Kurt that they should get tattoos.
As graduation nears, the seniors make plans for their future, while New Directions pays homage to Billy Joel with performances such as "Movin' Out."
The students accuse Blaine of being too controlling in his plan to win Nationals, and Kurt also runs into control issues over the band's first gig.
The New Directions audition for roles in McKinley’s living nativity scene, while Rachel, Kurt and Santana work as Santa’s elves at a New York mall.
Santana wins the role of Rachel's understudy in "Funny Girl" while back in Lima, Tina and Artie compete against each other for class valedictorian.
As graduation nears, Tina, Blaine and Sam try to savor their final days together, while Elliot gets in the middle of Rachel and Santana’s feud.
The members of New Directions travel to sunny Los Angeles to compete in Nationals and bring two special guests with them.
Current and past members of New Directions reunite to perform new renditions of their favorite performances, which include "Toxic" and "Valerie."
April and Holly hatch a plan to save New Directions as the glee club's fate nears, while Rachel and Santana try to make amends after their big fight.
New Directions alumni are adjusting to their new lives in the Big Apple a few months after the end of glee club, but life isn't perfect for all.
Rachel takes the next step in committing to her role in “Funny Girl," while Kurt is the victim of a hate crime based on his sexual orientation.
Artie tests positive for an STD and is forced to tell his sexual partners, while Kurt and Blaine have relationship issues.
The night for Rachel’s Broadway debut in “Funny Girl” has arrived and she has special guests in town to support her career-defining moment.
Rachel jeopardizes her “Funny Girl" lead, Mercedes tries to help Santana with her recording deal and Blaine befriends an older, rich socialite.
Rachel tries to salvage her reputation by creating a charity for rescue animals and Kurt nabs the lead in a retirement home production of “Peter Pan.”
An eccentric television writer catches Rachel off guard, Sam and Mercedes feel the pressure of commitment and it's time for Blaine's big showcase.
The vocal landscape in Lima gets a makeover as Rachel leads the New Directions, Blaine coaches the Warblers, and Mr. Schue directs Vocal Adrenaline.
Alums Puck, Quinn, Santana, Mercedes, Brittany, Artie and Tina return to McKinley to help Rachel and Kurt recruit for the newly resurrected glee club.
Rachel and Kurt butt heads over the direction of the New Directions. Meanwhile, Becky returns to McKinley with a new boyfriend in tow.
With an invitational approaching, Sue does her best to sabotage both Rachel and Will -- not to mention Blaine and Karofsky's relationship.
While Sue meddles to reunite "Klaine," Kitty and Rachel work on the set list for the invitational and Sam enlists a football player for the glee club.
As Santana and Brittany prepare for their wedding, Rachel and Sam waffle about romance and Mercedes returns to Lima with ulterior motives.
Will takes desperate measures to teach the bullies of Vocal Adrenaline about tolerance; Rachel finds out her childhood home has been sold.
As Brittany and Santana prepare for their big day, a surprisingly kinder, gentler Sue encourages everyone to follow their hearts.
A demanding tween requests that New Directions perform at his bar mitzvah, and the glee club must band together for its first public performance.
When Dalton Academy burns to the ground, the Warblers must combine with New Directions; Rachel begs Carmen Tibideaux to let her return to NYADA.
New Directions and the Warblers compete at Sectionals; Rachel must choose between returning to NYADA and performing on Broadway with a past love.
New Directions flashes back to 2009 as the original members reveal why they signed up for the glee club in the first place.
Say good-bye to McKinley High as glee club members past and present take a final bow in the stirring series conclusion.