Thomas & Friends: All Engines Go! is an upcoming American-Canadian-British flash-animated children's television series that serves as a reboot of the original "Thomas & Friends" series that ran from 1984 to 2021. The series was originally set to be the show's twenty-fifth season, before Mattel Television confirmed that it was a new show altogether. It is said to introduce "an entirely new approach to "Thomas & Friends" content," with a new animation style and story structure. "All Engines Go!" is set to premiere in October 2021.