Postman Pat and the Grumpy Pony

S5, E24: While Ted fixes the hitch on Amy's horse box, Amy and Meera take Pumpkin for a roam around Greendale. Unfortunately, Pumpkin hasn't had his hay this morning and is one grumpy pony. He doesn't want to go anywhere! Amy asks Pat if he'll go fetch Ted to pick up Pumpkin with her trailer. When Pat can't find Ted, he decides to drive it over himself, but the hitch is still broken and the trailer goes careening off. How will they ever get Pumpkin home now?