Twin Trouble is the tenth episode ever made in Season 6.
Trevor breaks down on a crossing and Donald runs into his haycart, blaming Douglas, who was double-heading a goods train with him. The twins fall out, so Donald jumps at the opportunity to help Duck at the Shunting Yards. One day, Donald is not looking where he is going and falls into a ditch. Duck gets Douglas to help and the twins make up.
- When Trevor cries "Oh no!", the studio is reflected in his paintwork.