The most popular kids show on Earth is about to embark on its biggest adventure yet. On Sunday, Ludo Studios will release "The Sign," a brand new episode of Bluey that runs for nearly a half-hour — four times as long as the show's normal episodes. This special event is one of the most highly anticipated episodes of kids television in years, especially considering that the latest episode set "The Sign" up to have major implications for the future of the series. As it turns out, "The Sign" will also be a barometer for whether or not the creative team explores a Bluey feature film.