VIDEO: Promo - GLEE's 'Wonder-ful' Episode!

Check out the promo for the upcoming episode of GLEE, titled "Wonder-ful", airing Thursday, May 2 (9:00-10:00 PM ET/PT) on FOX. Mercedes and Kurt are back in the choir room and Rachel's nemesis returns. Click below!

In this episode, the members of New Directions take on the greatest hits of music icon Stevie Wonder. Meanwhile, Artie receives news that could affect his future and his mom (guest star Sagal). In New York, Rachel prepares for her "Funny Girl" callback.

Glee is a musical comedy about a group of eager and ambitious students who strive to outshine their singing competition to win Nationals while navigating the cruel halls of McKinley High. Since its debut, Gleehas become a bona fide cultural phenomenon, received prestigious honors including the Golden Globe and Peabody Award and singlehandedly Made Glee clubs cool again.

In addition to the regular cast, Glee has featured guest appearances by a wide range of talented performers, including Kate Hudson, Sarah Jessica Parker, Gwyneth Paltrow (who won the 2011 Emmy Award for Outstanding Guest Actress in a Comedy Series), Carol Burnett, Kathy Griffin, Cheyenne Jackson,John Stamos, Britney Spears, Kristin Chenoweth, Idina Menzel, Jonathan Groff, Molly Shannon, Olivia Newton-John and Neil Patrick Harris, who won a 2010 Emmy Award for Outstanding Guest Actor in a Comedy Series for his work on the show.