From ancient Egypt to the Tudors to the Nazis, the film industry has often defined how we think of the past. But how much of what you see on the screen is true? Picking her way through Hollywood's version of events, an acclaimed historian sorts fact from fiction. Based on the long-running column in the Guardian, Reel History takes a comic look at the history of the world as told through the movies—the good, the bad, and the very, very ugly.