The network announced last week that it has renewed the show about music-loving students through 2014-2015, its sixth season.
In a statement, Fox Entertainment Chairman Kevin Reilly said "Glee" continues to break new ground as a rare successful TV musical comedy.
The show been a music hit as well, with more than 50 million downloads of "Glee" tracks and worldwide album sales of more than 13 million.
"Glee" has expanded from its original focus on the McKinley High School glee club to the college world of Rachel and Kurt, played by cast members Lea Michele and Chris Colfer.
Thursday's episode will feature Sarah Jessica Parker. Gwyneth Paltrow and Kate Hudson among previous "Glee" A-list drop-ins.
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