When Diesel teases Thomas for being stinky Thomas is determined to prove otherwise. When Thomas is given a special to deliver some stinky cheese to the docks, he goes out of his way to avoid any diesel engines on the way. When Thomas sees 'Arry, he tries to back away, but he crashes into Bert. His cheese delivery flies high into the air and splatters all over them. Thomas feels very silly. He's given some new cheese and puffs quickly to the docks - this time he doesn't mind being stinky. At the docks, Sir Topham Hatt declares Thomas to be really useful and gives Diesel, Arry and Bert the stinky job of shunting the cheese at the docks.