Thomas & Friends: All Engines Go premiered on Cartoon Network's Cartoonito block in the United States on September 13, 2021, and on Treehouse in Canada on September 18, 2021. The series follows the adventures of a now child-aged Thomas and the other engines in his age group, as they learn many life lessons and solve problems while going around on their daily lives. It introduces "an entirely new approach to Thomas and Friends content," with a new animation style and story structure.