S4, E5: The school production of “Grease” is underway and Marley (Melissa Benoist), Jake (Jacob Artist), Kitty (Becca Tobin) and football player Ryder (“The Glee Project” winner Blake Jenner) compete to play “Danny” and “Sandy.” Meanwhile, former glee clubbers Mercedes (Amber Riley) and Mike (Harry Shum Jr), return to cast the play and Mr. Schuester (Matthew Morrison) struggles with a difficult decision. Musical performances include “Hopelessly Devoted To You”, Blow ME (One Last Kiss), “Juke Box Hero”, “Everybody Talks” and “Born To Hand Jive”.