We delve into the world of the most notorious white supremacist group in America – the KKK. Once having over a million members, today it's just a shadow of its former self. We meet real members and look at the impact of the group has had on America.

Exploring the secrets of The Assassins, one of the mostly deadly, notorious and secretive groups in the Medieval world, and discovering whether their skills and tactics been passed down and copied by today's Islamic terrorists.