Molly is a new engine on the Island and is given the job of taking empty trucks back to the coaling plant. She feels silly and wants to take full trucks like a really useful engine. Thomas has an idea to pretend that her trucks are full but when his plan goes off track, Molly and the other engines learn that empty trucks can be important too. Edward the Really Useful Engine The big engines feel that Edward, the "back engine", is too old and unreliable and should be retired, so Sir Topham Hatt sends him to work with Stepney. But who will do his job? Duck is told to do Edward's work, but is not happy as the trucks make his job difficult, and then stop him altogether. With no back engine on Sodor, will the big engines realize that they need Edward? Respect for Gordon When Gordon's firebox develops a rattle, the other engines tease him. Embarrassed, Gordon decides that the other engines need to show him more respect and devises rules that the engines must follow. But when his strict rules lead to an accident and a trip to the fitters yard, will the engines miss Gordon and realize that all engines are really useful and important?
