David Olusoga examines fifty years of BBC documentary archives to try and discover why dictators can have such a powerful appeal and asks if our fascination has fed their power. Show more

How our attitude towards the age of exploration has changed, from marvelling at incredible tales of adventure to the consequences of conquest. Show more

Professor Danielle George uses five decades of BBC archive to find out how well disaster documentaries keep pace with scientific theories that advance every day. Show more

Alice Roberts shows how the Vikings' story has changed on TV since the 1960s, from being seen as brutal barbarians, to pioneering traders able to integrate into multiple cultures. Show more