WATCH: Behind-the-scenes of the all-new GLEE episode - 'Feud'

GLEE: Finn (Cory Monteith, L) and Will (Matthew Morrison, R) perform in the "Feud" episode of GLEE airing on Thursday, March 14 (9:00-10:00 PM) on FOX 50.

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By FOX50.com

Story Created: Mar 13, 2013 at 3:15 PM EDT

Story Updated: Mar 14, 2013 at 10:41 AM EDT

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For the first time in glee club history, the students give the teachers, Will and Finn, an assignment to hash out the tension between them. Meanwhile, Santana becomes increasingly suspicious of Brody’s side job in the all-new “Feud” episode of GLEE airing Thursday, March 14 (9:00-10:00 PM) on FOX 50. (GLE-416) (TV-14 D, L)

Cast: Matthew Morrison as Will Schuester; Jane Lynch as Sue Sylvester; Lea Michele as Rachel Berry; Cory Monteith as Finn Hudson; Chris Colfer as Kurt; Kevin McHale as Artie; Amber Riley as Mercedes; Mark Salling as Puck; Jenna Ushkowitz as Tina; Naya Rivera as Santana Lopez; Dianna Agron as Quinn; Heather Morris as Brittany; Darren Criss as Blaine Anderson; Chord Overstreet as Sam Evans; and Jayma Mays as Emma Pillsbury.

Guest Cast: Samuel Larsen as Joe Hart; Jacob Artist as Jake Puckerman; Melissa Benoist as Marley Rose; Dean Geyer as Brody Weston; Becca Tobin as Kitty; Alex Newell as Wade Adams; and Blake Jenner as Ryder Lynn.