Quinn Fabray
A number of former main characters on the show have returned for this two-part episode. These include Yale student Quinn Fabray (Dianna Agron), MIT student Brittany Pierce (Heather Morris), Noah "Puck" Puckerman (Mark Salling), who was last seen riding off to join the military, UCLA student and aspiring singer Mercedes Jones (Amber Riley), and Joffrey Ballet School student Mike Chang (Harry Shum, Jr.).