Music This Mysterious Number Appears in Cartoons Everywhere…… and you probably didn’t even know it Jan 8, 2017 FacebookTwitterPinterestWhatsAppLinkedinReddItEmailPrint 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?