Three men who have been conned by Arthur decide to pool their resources to get back at him. He’s drawn into a card game for big money, and is landed with a Trabant,which is worth very little. Then he bids at an auction, thinking that he's buying furniture but finds himself buying a greyhound that proves to be a non-runner. Then Ray sells a car, taking a piano in part-exchange, thinking it's a rare and valuable item, but it proves to be worth only a hundred pounds. Arthur begins to realise who is behind the con and sets out to turn the tables on them. The greyhound proves its worth at a stud farm, the car is sold back to the man who sold it to Arthur - at ten thousand pounds. And Arthur presents the piano to the Winchester. (thetvdb.com)