Doctor Who - Season 2 Episode 12 The Slave Traders
Overview: The travellers decide to take a holiday near ancient Rome, but after a month the Doctor gets restless. He and Vicki determine to visit Rome, and while they are gone Ian and Barbara are abducted by slave traders. All roads lead to Rome, however, and the travellers find themselves at the mercy of the country's petulant emperor, Nero... (Originally broadcast in four parts.)