Music This Mysterious Number Appears in Cartoons Everywhere…… and you probably didn’t even know it Jan 8, 2017 Facebook Twitter Pinterest WhatsApp Linkedin ReddIt Email Print It’s hidden in movies and TV shows everywhere. In The Simpsons, The Hunger Games, Avengers, American Dad, Mission: Impossible, Doctor Who. And in every Pixar movie ever. But what does the mysterious “A113” code mean?