Thomas & Friends: Season 18, Episode 9

18 - 9: Thomas the Quarry Engine

Mavis is upset she doesn't get to see the sights of Sodor like the others do. Diesel offers to be her back engine, which means Thomas has to stay at the quarry, much to his dismay. He eventually finishes, but needs a back engine in order to take his train to the Docks. Thomas becomes fed up and tries to pull his train of stone alone.