Plot: A pair of revealing female figures originally displayed in a French brothel, an unusual table clock with a floating turtle which tells the time, a chemist's mortar dating from 1573 and a Victorian toilet given as a present. From Knebworth House in Hertfordshire, Michael Aspel introduces unseen finds from previous Roadshows in the series and talks to expert Clive Farahar about Knebworth's colourful former incumbent Edward Bulwer Lytton, Victorian playwright and philanderer, whose turbulent marriage caused a major scandal