They say he was insane. The stories of his cruelty and depravity are countless. He was one of the most feared and powerful men of the ancient world. He was Caligula, Emperor of Rome. He killed on a whim and it was said that to be in his presence was playing with your life. But almost everything known about Caligula comes from only two original sources, and they both had reasons to twist the truth. Now using the latest archaeological evidence, including identifying the possible location of his tomb, this special reveals the true story of the Emperor they called the Viper of Rome: Caligula.