In the episode, which begins at 8 PM ET, "Principal Figgins (guest star Iqbal Theba) asks New Directions to perform at the dance much to prom coordinator Sue's dismay," according to press notes. "Things get heated as the competition for prom king and queen draws closer, and Jessie St. James (guest star Jonathan Groff) returns."
Groff will also be seen May 17 at 8 PM ET in an episode entitled "Funeral." In the episode "New Directions continues to strategize their set list for Nationals with a little help from Jessie St. James (guest star Jonathan Groff). Meanwhile, an unexpected loss rocks the world of one of McKinley's own."
The season finale, which is scheduled for May 24 at 9 PM ET, will concern "New Directions [heading] to Nationals to compete in the ultimate singing showdown."
In a recent interview with Playbill.com, Groff spoke about possibly returning to the hit TV series. "I had a blast on the show. I'd love to go back and do another episode," Groff said. The rehearsal schedule for the music-filled series he admitted is "pretty intense. A normal television show is really intense because it moves so fast and you have no rehearsal and you just sort of show up and do the scenes, and it's like a machine. ... And then on 'Glee,' you add on to that going to the studio and recording your number, and if it's a dance number, going to the rehearsal space and choreographing it, as well. So it's just sort of throwing two more elements into that already packed schedule. I had an easier time because I was a guest star, so I got to breeze in and do a couple of numbers and breeze back out again, but for the members of the company that are there every day in the classroom, like Matthew [Morrison] and all of the kids, it's a real grind for them, because even if that particular episode isn't about them, and they're not necessarily singing a lot in that episode, they're still doing all those classroom scenes, and probably recording and choreographing whatever they're doing for the next show. So, they're kept very, very busy, and the schedule is very, very tight."
"Glee" airs Tuesday nights at 8 PM ET on Fox.