As the countdown to graduation continues, the kids of New Directions prepare a high-concept routine for Nationals. When Tina bumps her head, the world of New Directions is turned upside down in her eyes.

Then, the New Directions perform at Nationals for celebrity judge Lindsay Lohan (guest-starring as herself), in an all-new special two-hour “Props/Nationals” episode of GLEE airing Tuesday, May 15 (8:00-10:00 PM) on FOX. (GLE-320/21) (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; Iqbal Theba as Principal Figgins; Damian McGinty as Rory Flanagan; LaMarcus Tinker as Shane; Samuel Larsen as Joe Hart; Dot Marie Jones as Coach Beiste; Vanessa Lengies as Sugar Motta; Eric Bruskotter as Cooter Menkins; Lindsay Lohan as Herself.

BONUS CLIP:  See Tina's nasty fall into the fountain that turns her world upside down.

BONUS CLIP #2: From the second hour, Will and Sue have to come up with a battle plan when one of the kids comes down with food poisoning.