Will encourages the Glee Club to support Artie, and asks each of them to perform in a wheelchair. Meanwhile, Kurt and Rachel compete for a big solo.

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.

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 give Sue a vote of confidence with a makeover that is definitely in “Vogue”.

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.

After a tough loss at Regionals, the glee club is back as the underdogs of McKinley High. When the school is faced with even more budget cuts, Mr. Schuester pushes the kids to help recruit new members for the club. Rachel and Finn disagree on new recruits, and aren’t sure they will be able to come together in perfect harmony.

When Brittany and the gang try to convince Mr. Schuester to let them do a Britney Spears number, he is reluctant to go that edgy. Meanwhile, an insecure Will is curious about Emma’s new beau, Dr. Carl Howell, so he convinces her to bring him in to talk to the kids about dental hygiene. While the dreamy doc inspires the girls to take their dental health more seriously, Will is left feeling worse than before.

Will decides to have the glee club perform “The Rocky Horror Show” for the annual school musical after learning of Emma’s newfound love for the cult classic. Despite Sue’s usual scheming, the members of New Directions inject their distinctive style to such timeless tracks as “The Time Warp” and “Damn It, Janet.”

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.

When Mr. Schuester gets sick, a substitute teacher takes over his Spanish class and the glee club and winds up winning over the whole New Directions clan. Meanwhile, when Sue fills in for Principal Figgins as McKinley’s top dog, she tries to flex her power on campus.

It's all about wedding and parents with Kurt getting ready for his father Burt's upcoming marriage to Finn's mom Carole, Sue decides to compete by getting married as well which will lead to the introduction of an awesome guest star: Carol Burnett. Carol will play Sue's Nazi-hunting mother Doris, who comes to visit Sue in Ohio.

It's Christmas time at McKinley High and Finn tries to get everyone in the holiday spirit; Brittany needs no help because she still believes in Santa Claus. In other news, Sue scams the teacher's Secret Santa

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.

Principal Figgins teaches the student body about the danger of underage drinking, and the glee club is personally touched by the message. Meanwhile, Mr. Schuester and Coach Beiste indulge in a little fun of their own.

The glee club agrees to help raise funds for another under-the-radar group; big decisions are made and relationships are tested.

Sue Sylvester revives the school newspaper and decides to print a few inflammatory blind items. The glee club gains a whole new respect for Sam when they discover some interesting new information about his family life. Meanwhile, April Rhodes (guest star Chenoweth) returns to Lima and tries to convince Mr. Schuester to hit the road with her.

When the entertainment for prom falls through, Principal Figgins asks New Directions to perform at the dance much to prom coordinator Sue’s dismay. Things get heated as the competition for prom king and queen draws closer, and Jessie St. James returns.

New Directions continues to strategize their set list for Nationals with a little help from Jessie St. James. Meanwhile, an unexpected loss rocks the world of one of McKinley’s own.

The glee kids are down in the dumps following their disappointing showing at Nationals, so Will assigns them a project to get them back on track. Meanwhile, Ms. Sylvester wants to go to Washington: Sue's running for Congress.

Shelby Corcoran returns to the halls of McKinley High. Meanwhile, Mr. Schuester initiates a boot camp for some of the members of New Directions.

Congressional hopeful Sue Sylvester starts a smear campaign to ruin the candidacy of her biggest rival. Puck falls in love, and glee club directors Will and Shelby encourage some friendly competition between their clubs

Finn tries to rally the rival show-choirs behind one of their own; Sue’s bid for political office causes heartbreak for another teacher; and the student body elections turn scandalous.

When Will tries to plan a special surprise for Emma, he enlists the glee club to help him sweep her off her feet. Meanwhile, Becky sets her sights on Artie, and Finn makes an announcement about his life plans after high school that surprises the glee club.

Will assigns the glee club a Spanish singing assignment, and enlists the help of his musically-inclined night school teacher. Meanwhile, Rachel spills the beans to Kurt and Mercedes on Finn's marriage proposal, and Mercedes has love complications of her own.

Much to Blaine's chagrin, his big-shot Hollywood actor brother, Cooper, comes to visit.

The Glee Club does disco in a tribute to Saturday Night Fever.

Brittany goes into high gear as class president to spearhead the prom. Then, after prom king and queen nominations are announced, the kids kick into campaign mode, and some of the outcasts organize a rival celebration.

The glee club travels to Chicago, Illinois, to compete in Nationals against the best show choirs in the country, including Vocal Adrenaline, for celebrity judges including Lindsay Lohan and Perez Hilton.

In the wake of Kurt’s departure, Blaine tries to distract from his loneliness by entering the race for Senior Class President. The move puts him in direct conflict with Brittany who looks to repeat for a second term. After struggling to come up with fresh ideas for New Directions, Will begins to fear that he’s losing his enthusiasm for show choir. When an opportunity to reignite his passion and make a lasting positive impact on his students presents itself, the procrastinating Will gets prodding from two vastly different sources. After landing an internship with fashion icon Isabelle Klempt, Kurt comes up with an out-of-the-box idea to revitalize the fashionista’s sagging brand. While his initiative earns him a new mentor and earns Rachel a much needed makeover, his success also has a troublesome impact back in Lima.

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

Finn thinks about his future with the glee club after Sectionals are over. Elsewhere, Rachel gets ready for NYADA's winter showcase; and Kurt gets a second chance at an audition.

A tribute to the film "Love, Actually" with different storylines all dealing with the holidays. Sam and Brittany live as if it's the end of the world as the Mayans know it. The Puckermans, including half-brothers Puck and Jake and their mothers, come together for Hanukkah. Artie has an epiphany through a dream sequence. Kurt has an unforgettable Christmas.

McKinley’s Sadie Hawkins dance offers several gleeks a rare chance to feel empowered. Sam and Blaine investigate a possible cheating scandal at Sectionals. Kurt makes a new friend at NYADA.

New Directions produces a sexy calendar to raise money for their trip to Regionals. Rachel is faced with a personal dilemma when she’s cast in a student film. Finn and Sue go toe-to-toe.

Will and Emma get ready for their Valentine's Day wedding with the help of past and present New Directions members.

Blaine and Sue will have a sing-off, while Ryder has a scary story coming.

The members of New Directions are prepping for regionals, but when an unthinkable event occurs at McKinley High, perspectives are put into order.

When Mr. Schuester comes up with the setlist for regionals, the New Directions are not pleased, Rachel sings an unexpected song for her "Funny Girl audition", and Marley writes an original song.

When the power goes out at McKinley High, Will and Finn enlist the members of New Directions to "unplug" and perform acoustic numbers. Meanwhile, Isabelle Wright asks Kurt to volunteer at the Vogue.com charity event, with Rachel and Santana in tow.

The members of New Directions tackle their assignment of getting out of their comfort zones and determining whether they're more like "Katy" (Perry) or (Lady) "Gaga." Kurt holds auditions for his new band and must decide if he'll let in the overly bold performer, Starchild. Meanwhile, Jake gets closer to Bree as he and Marley grow apart.

The glee club learns the dance of the hour: twerking. Meanwhile, Marley discovers Jake's relationship with Bree, and Rachel tries to convince Kurt they both should get tattoos.

The New Directions pay homage to the Piano Man: Billy Joel. As graduation looms closer, the seniors make plans for their futures beyond the halls of McKinley.

Blaine believes he has the best plan to win nationals, but the other club members think he's too controlling; members of Kurt's band disagree over the venue of their first gig; Sue gets in touch with her feminine side.

Sue Sylvester introduces the episode as a Christmas special that FOX did not allow to air from last year. The members of New Directions audition for roles in McKinley's living Nativity Scene. Meanwhile in New York, Rachel, Kurt and Santana work as Santa's elves at a mall.

Santana auditions and snags the role of Rachel’s understudy in “Funny Girl,” causing a feud between the roommates. Meanwhile, back in Lima, Tina and Artie compete against each other to be the class valedictorian.

When Sam, Tina and Blaine plan a lock-in at the school, Becky unexpectedly joins in; Elliot (Adam Lambert) gets caught in Santana and Rachel's feud.

The glee club -- and two special guests -- travels to Los Angeles to compete in nationals.

The glee club are saying goodbye to each other when two old guests come and decide to save the glee club.

With the McKinley High glee club officially at an end, past and present members of New Directions look towards the future.

The gang must rally an uncharacteristically insecure Rachel in time to make her Broadway debut in Funny Girl… but not everyone in the audience is wishing Rachel the best.

Puck, Quinn, Santana, Mercedes, Brittany, Artie and Tina all return to McKinley for Homecoming and help Rachel and Kurt recruit for the new glee club.

Rachel and Kurt struggle as they try to rebuild and co-direct the glee club at McKinley. Meanwhile, Sue is concerned when Becky brings her new boyfriend to town.

Rachel hopes to form a deal in which Will's glee club purposefully under-performs at their invitational; Sue wants Sam to distract Rachel.

Rachel and Kurt redouble their efforts to recruit new members to New Directions after new rules are announced for the Show Choir Invitational. Sue enacts an elaborate plan to try reunite Kurt and Blaine. Will and Rachel have a much needed heart-to-heart.

Dalton Academy burns to the ground, and the Warblers must combine with the New Directions to form a super group. Meanwhile, Rachel begs Carmen Tibideaux to let her return to NYADA.

All of Will’s hard work and dedication to the Glee Club and to fostering the talents and dreams of his students pays off in a major way, and everyone shares in the feeling of joy that permeates the school as teachers and students reflect on their shared journey. Old rifts and wounds are healed and new sights are set on a promising future. Everyone seems to be ending up exactly as expected and right where they belong… along with more than a few unexpected surprises.