Fiona Bruce and the experts visit Layer Marney Tower near Colchester in Essex to meet one of the biggest Roadshow crowds on record. Their busy day finds them focusing on a one-off clock made for the Great Exhibition in 1851, a painted portrait that looks modern and which has an astonishing valuation. A plain kitchen table turns out to have quite a story, having been used as the campaign HQ for Mary Whitehouse's "Clean Up TV campaign."