Summary: It's 48 CE. Messalina is dead. So now Claudius needs a new wife. There are several candidates, including Julia Agrippina, the daughter of Germanicus, making her Claudius' niece. Conveniently, her rich husband had recently died. She is also the mother of a young boy called Domitius Ahenobarbus - but who will soon change his name to Nero.
