Uh-oh, Christmas is in trouble! But Elmo and Abby Cadabby are here to help! When the ten numbered boxes in Stiller the Elf s magical Christmas Counter Downer become lost, the arrival of Christmas is in doubt. Can Elmo and Abby Cadabby find the missing boxes and restore the big countdown to everyone s favorite holiday? Elmo's Christmas Countdown airs Tuesday, December 24, 2013 at 6 p.m. on WXXI CREATE.