S1, E6: After being betrayed and humiliated by Britain’s Roman overlords once her chieftain husband died, Queen Boudica turned on her masters. She set about planning her revenge, building an army and uniting warring tribes by focusing on a common enemy. She razed cities and defeated Roman legions, but her resistance finally came to an end at the Battle of Watling Street, where 200,000 Britons died.