WATCH: The cast of GLEE is "stayin' alive" in an all-new episode!

GLEE: Mercedes (Amber Riley, C), Santana (Naya Rivera, L) and Brittany (Heather Morris, R) perform in the "Saturday Night Glee-ver" episode of GLEE airing Tuesday, April 17 (8:00-9:00 PM) on FOX 50.

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By FOX50.com

Story Created: Apr 15, 2012 at 7:49 PM EDT

Story Updated: Apr 17, 2012 at 4:46 PM EDT

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The New Directions pay homage to the movie "Saturday Night Fever" by grooving to disco-infused dance numbers in the all-new “Saturday Night Glee-ver” episode of GLEE airing Tuesday, April 17 (8:00-9:00 PM) on FOX 50. (GLE-316) (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; Jayma Mays as Emma Pillsbury; Dianna Agron as Quinn; 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; Heather Morris as Brittany; Harry Shum as Mike Chang and Darren Criss as Blaine Anderson.

Guest Cast: Chord Overstreet as Sam Evans; Lauren Potter as Becky Jackson; NeNe Leakes as Coach Roz Washington; Jonathan Groff as Jesse St. James.