As they come towards the end of their epic journey, the Wood brothers make a sacrifice to the gods at Lake Averno, come face to face with Hannibal in Rome and cross the Mediterranean to Tunisia, once the centre of the Carthaginian Empire, where they visit the site where the fate of an entire civilisation was decided in one final battle. On the way, they meet a Roman centurion and discuss Hannibal's legacy with the souk merchants of Tunis.