Back to the Future

Back to the Future it's the episode 25 from the season 22. The Tittle it's a reference to the 1985 Movie: Back to the Future

Plot
The episode begins with Ace singing Free and Easy, then he meets Thomas and introduces himself to Annie and Clarabelle, Thomas says that it was thanks to him that he managed to see the world, then Sir Topham Hatt arrives and tells him to pull the Jet Engine, but when Thomas pulls it, derails and ends up going back to the past with Ace, Thomas tells Ace that they must remain under cover and return to 2018, but the Jet Engine ... KA-BOOM, explodes, then they ask the Tatara Tatara Grandpa of Buddy, a friend of Thomas Brighton, who build him a Jet Engine of time travel, the TTA (Tatara Tatara grandfather) of Buddy gets it, and reach the future.

Trivia

 * This episode shows that time travel, in Sodor, if there is.