Fox to Air 'Super-Sized' Two-Hour GLEE Finale!

As first reported on TVLine.com, the FOX network has announced that it will combine the 20th and 21st episodes of GLEE into one, two-hour event on Tuesday May 15th. 

In the first hour of the episode, New Directions will plan for the upcoming Nationals competition. According to the report, Tina (Jenna Ushkowitz) will suffer a mild head injury in the middle of rehearsals and begin to experience a "different, yet oddly familiar, alternate reality."

The plot will reportedly have Mark Salling (Puck) playing Blaine, Cory Monteith (Finn) as Kurt, and Ushkowitz morphing into Rachel.

In the second hour of the episode, Tina will return to reality in time to perform with the glee club at Nationals. 

The episode airs on Tuesday, May 15th on FOX.