Glease
Glee: Season 4, Episode 6
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Greased Lightning hits McKinley on the opening night of the musical. Santana, Rachel and Kurt return to Lima for the occasion, while Kitty steps up her vendetta against Marley.
Show: Glee
Air date: November 15, 2012
Written by: Roberto Aguirre-Sacasa
Episode no: Season 4; Episode 6
Production code: 4ARC06