NBC has ordered hourlong holiday musical special How Murray Saved Christmas from The Simpsons‘ writer/producer Mike Reiss. It’s scheduled to air in December 2014. Based on Reiss’ best-selling children’s book of the same name, the story centers on cranky deli owner Murray Kleiner, who is forced to fill in for Santa one Christmas and does a weirdly wonderful job. Walter Murphy (Ted, Family Guy) will compose the music of the special, produced by Universal TV. Rough Draft Animation will serve as the animation studio. Reiss has worked on The Simpsons since the show’s inception, at one point serving as exec producer/co-showrunner. His feature credits include The Simpsons Movie and Ice Age: Dawn Of The Dinosaur.