What is true and what is false in the hideous stories spread about the controversial figure of the Roman emperor Gaius Julius Caesar Augustus Germanicus (12-41), nicknamed Caligula? Professor Mary Beard explains what is accurate and what is mythical in the historical accounts that portray him as an unbalanced despot. Was he a sadistic tyrant, as Roman historians have told, or perhaps the truth about him was manipulated because of political interests?

• Documentary
• History