Thomas and Diesel have a rivalry, with Diesel trying to prove himself by racing Thomas. However, a bridge accident hinders Diesel's efforts. Thomas rescues Diesel and is rewarded with a trip to the mainland. After a chain breaks, Thomas becomes stranded on Misty Island with a group of troublesome locomotives. They try to cross a tunnel but get trapped in a cave-in. Thomas uses his engine smoke to signal for help and is eventually rescued.
Thomas & Friends: Misty Island Rescue
A curious child is left abandoned on a strange island where steam engines freely roam, and he must use his wit to find a way off and return to the comfort of Sodor's railway system.