This episode covers the aftermath of the Roman withdrawal from Britain, focusing on the lack of sources for the centuries afterward and the arrival of the Anglo-Saxons. It begins with the legend of Hengist and Horsa, through the Northumbrian Golden Age all the way to the end of the Mercian supremacy in the wake of Offa's death. Recommended books: Chris Wickham - The Inheritance of Rome (2010) - A very good overview of all of European history, good for context. James Campbell et al. - The Anglo-Saxons (1991) - Seriously, this book is the best book I've ever seen on Anglo-Saxon England, its very accessible and the essays are phenomenal. If you have access to a university library I'd recommend a read through Dorothy Whitelock's English Historical Sources 500-1042.