Alice's train odyssey takes her from Athens and across the Corinth Canal to Corinth, where her guide, Socrates, takes her to an archaeological dig. She tracks down the precise place where St Paul stood to preach Christianity to the masses on his Greek pilgrimage. From Corinth she heads to Piraeus to meet an expert called Aristotle, who has a theory on the value of the ideas of the Ancient Greeks to our modern situation. After learning about sea battles between the Greeks and the Romans, Alice takes a ferry to the historic island of Paros in the Cyclades.

In this final episode, Professor Alice Roberts is back on the train and learning more about the Ancient Greek culture that thrived in Türkiye over 2000 years ago. From the Aegean port of Kusadasi, Alice goes to the spectacular and beautifully preserved city of Ephesus. Later, she encounters an important historic rock carving, from an empire before the Greeks, that's recently been vandalised. Alice visits an old friend at the acropolis of Pergamon, then scrutinises an expert on Troy to test the veracity of the ancient stories of Homer in The Iliad, as she completes her own personal odyssey.