The Trouble with Mud

The Trouble with Mud is a Season 3 episode. It was a windy day and many engines were getting covered with Mud. Gordon refused to be cleaned thinking he was "too important", but was soon forced to wash when the fat controller seen him. He was forced to shunt trucks for the rest of the day. But he later saves the day when he helps James up the hill. That fat controller reminds Gordon that if he remmbers to be clean at all times he can pull the express again.