Trisha Rae Stahl

The BAU makes startling discoveries as they search for a four-year-old girl who went missing while staying with a relative.

With Brittany S. Pierce down in the dumps, Mr. Schue hopes the music of her icon will cheer her up. In NYC, Rachel has a point to prove to dance teacher, Cassie.

Graduation is over but there's so much more in store! Who stays? Who goes? Are Finchel really over? Will Sue ever have that baby?! Of course McKinley High will need some new students, plus, mega-stars Sarah Jessica Parker and Kate Hudson have joined the cast to act as mentors to budding New York stars Rachel and Kurt.

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.

While Finn hopes to unite the warring New Directions by dividing them into pairs to perform duets, the Dalton Academy Warblers make their presence felt.

Finn enlists his former buddies to help mentor New Directions through Sectionals, while in NYC, Rachel and Kurt's quiet celebration doesn't quite go to plan.