Writer: Rona Munro
Director: Charles Palmer
Producer: Nikki Wilson
Companions: Bill Potts (Pearl Mackie) and Nardole (Matt Lucas)
Series: 10, ep. 10
Summary: The Doctor, Bill, and Nardole are in the days of ancient Rome, when the Romans were invading Britain. They are in search of the Ninth Roman Legion. The Legion is battling beings known as the Eaters of Light.