The episode, according to FOX, will have Glee Club head Will Schuester (Matthew Morrison) have his kids perform a version of Richard O'Brien's musical.
While the network has yet to announce specifics, TVGuide.com has released photos showing that Cory Montieth will play Brad, Chord Overstreet will play Rocky, Chris Colfer will play Riff Raff, Dianna Agron and Naya Rivera will share the role of Magenta, and John Stamos will play Eddie. In addition, Barry Bostwick and Meat Loaf, who appeared in the film version, are scheduled to make guest appearances.
Also expected to appear in the episode are Lea Michele, Amber RIley, Jane Lynch, Jenna Ushkowitz, Jayma Mays, Kevin McHale, Mark Salling, Heather Morris, Harry Shum, Jr. and Lauren Potter.
Also, as previously reported, Glee: The Music, The Rocky Horror Glee Show, a seven-track recording featuring songs from the episode, will be released on October 19. Songs will include: "Science Fiction Double Feature," "Damn It, Janet," "Whatever Happened To Saturday Night?," "Sweet Transvestite," "Touch A Touch A Touch A Touch Me," "There's A Light (Over at Frankenstein Place)" and "Time Warp."