Harry Shum Jr. and Amber Riley Harry Shum Jr. and Amber Riley

Finn (Cory Monteith) will have some big shoes to fill on Glee once he takes over as director of New Directions.

New Glee Photos: New Directions take on Grease and Brody takes off his shirt!

With the pressure mounting, Artie (Kevin McHale) will call in a few alumni — Mercedes (Amber Riley) and Mike Chang (Harry Shum) — to help out. How will they lend a hand? Watch the exclusive first look at Glee's return episode, which airs Thursday at 9/8c on Fox.