Our earliest pagan sources for the life of Jesus - the historians Josephus, Tacitus, and Suetonius - tell us almost nothing about Jesus. The letters of St Paul are uninformative, as are rabbinic sources. We have to rely on the four gospels. These have their own agendas. In this episode I explore the relationships between the synoptic gospels: Mark, Matthew, and Luke. Today, we believe that Mark was the first gospel, and that both Matthew and Luke drew upon Mark. But Matthew and Luke have material in common, material not found in Mark. Where did that come from? Most scholars say it was the mysterious source called "Q". Others disagree.