Glee Christmas Sneak Peek! Cast Performs "Do They Know It's Christmas?" in Season 3, Episode 9 [VIDEO] Tweet December 9, 2011 by Semhar Related: Glee, Music , Sneak Peeks , Season 3 Episode 9 Credit: YouTube The members of New Directions even manage to make Sue Sylvester smile (!) in Season 3's "Extraordinary Merry Christmas" when they spread their Christmas cheer (through song, natch!) for a group of adorable kids in need. Tear!