Jeremy Clarkson researches his family tree - and uncovers a potential gold mine. Jeremy's great-great-grand father Caleb Kilner hit on the idea of manufacturing glass jars with rubber seals. By the 1890s the Kilners were packaging moguls, with a lucrative empire built through a winning combination of ingenuity and aggressive commercialism. But by the 1930s the company had gone bust. So what went wrong - and what happened to the family fortune? Director Matthew Thompson : Series producer Victoria Watson
www.bbc.co.uk/familyhistory