Julius Caesar is one of the most well known Roman historical figures. He conquered Gaul, changed the nature of the Roman state from republic to almost empire (although it took Augustus to finish that job), and his writings are still read today in Latin classes. Discussing him on In Our Time were Christopher Pelling (University of Oxford), Catherine Steel (University of Glasgow) and Maria Wyke (University College London).
Spartacus was not just the subject of a famous film, but also a real life gladiator in the 1st Century BC who successfully escaped and orchestrated a slave rebellion in Italy. He had some success for a couple of years before being killed by Crassus, and his rebellion was put down. Talking about it on In Our Time were Mary Beard (University of Cambridge), Maria Wyke (University College, London) and Theresa Urbainczyk (University College, Dublin).