Glee Season 5 Spoilers - 100 - 5x12 - Episode 12

GLEE: Quinn (guest star Dianna Agron, L) and Puck (guest star Mark Salling, R) visit Finn’s jersey in the “100” episode of GLEE airing Tuesday, March 18 (8:00-9:00 PM ET/PT) on FOX. ©2014 Fox Broadcasting Co. CR: Adam Rose/FOX

Chace Crawford guest stars as Biff McIntosh, Quinn’s (Dianna Agron) douchey Yale boyfriend on the 100th Glee episode, airing on March 18! And by the looks of the photo above, he gets what he deserves. Who wants to bet it’s Puck (Mark Salling) who throws him into the dumpster?

It’s a huge reunion as graduates return to McKinley to say goodbye to Will (Matthew Morrison) after principal Sue Sylvester (Jane Lynch) disbands the Glee club due to budget cuts.

Dianna, Heather Morris (Brittany), Mark Salling (Puck), Amber Riley (Mercedes), Harry Shum, Jr. (Mike) return as guest stars. Kurt (Chris Colfer), Rachel (Lea Michele) and Santana (Naya Rivera) will also be making the trip to Ohio from New York to send off their old choir teacher.

And as if that wasn’t enough, Kristin Chenoweth and Gwyneth Paltrow will reprise their roles as April Rhodes and Holly Holliday, respectively. Check out the photos from “100.” It’s a two parter, with “New Directions” airing on March 25.

Here’s an extended summary of the episode. IT’S A BIT SPOILERY.

Following the loss at Nationals and the subsequent and imminent disbanding of the glee club by Principal Sue, former gleeks return to McKinley to celebrate their shared history, and reflect on what the past one-hundred lessons have meant to them. Included in the returning throng are dueling divas Rachel and Mercedes who, despite each making great strides in their own fields seem determined to revive an old feud; a new-and-improved Puck who, as a recent military inductee, is intent on impressing and possibly reconnecting with former girlfriend – and mother of his child – Quinn, but gets an unwelcome surprise in the process; MIT student and mathematical savant Brittany who, due to her uncanny though not wholly welcome natural talent for the science of numbers, believes she has irrevocably lost with her creative streak; and Broadway bad-girl and borderline alcoholic April Rhodes, who may have a fix to the doomed club’s problems… but not if Sue has anything to say about it.

100 LESSONS, 100 EPISODES AND COUNTLESS MEMORIES ON AN ALL-NEW EPISODE OF “GLEE” TUESDAY, MARCH 18 ON FOX

Gwyneth Paltrow Reprises Her Emmy Award-Winning Role as Holly Holiday; Kristin Chenoweth Returns as the Unforgettable April Rhodes; and Chace Crawford (“Gossip Girl”) Guest-Stars in the Milestone 100th Episode

Current and past members of New Directions reunite for one final assignment – to reinvent their favorite performances. But these new versions of the series’ most iconic tracks should not be seen as goodbye to glee club. On the contrary, they are celebrations of what the club has meant to each and every member.

Check out a photo gallery of “100” including pictures of all your returning favorites!