Olivette Otele, Professor of History and Vice-President of the Royal Historical Society, answers key questions about the slave trade. From its origins to its abolishment.
Mark Williams, senior lecturer in Early Modern history at Cardiff University, tackles the big questions about the East India Company.
Orlando Figes talks to Dan about social and technological developments and their links with cultural changes back in the 19th century.
One of the grandest private houses in the world, the site of Blenheim Palace has been host to the murder of a royal mistress, the downfall of a quarrelling Duchess and the birth of Sir Winston Churchill. Dan Snow takes a tour of one of Britain's most famous attractions.
