Have you ever thought that centuries of keeping kingship within a very, very tiny gene pool may have resulted in history's royal families being a little bit...off? Meet Charles the Mad who thought that he was a wolfman made of glass. Or The Mad King Christian VII of Denmark. Or The Mad King George.This week, Jess and Philippa look at some of history's most eccentric rulers and the quirky habits that earned them that most sought-after epithet: mad.