Episode 4

Eric Knowles and his hand-picked team of talented restorers set up base at glorious Blenheim Palace. And it isn't long before the public start arriving with a bizarre mix of injured heirlooms - a carousel horse on its last legs, a well-used Victorian games chest and a painting that might just be the work of our country's greatest wartime leader.

But pride of place goes to an intimate sketch of Admiral Nelson. Once restored, it will do battle at a special Trafalgar Day auction. But how will it fare when it comes up against serious opposition, such as a Union Jack that was flown from one of Nelson's warships during the actual battle?