This Christmas Day 'Talking History' looks at the life and cultural legacy of St Nicholas and asks how a fourth century Greek bishop became Santa Claus. Joining Patrick on the panel are: Professor Salvador Ryan, Professor of Ecclesiastical History, Department of Theology, Maynooth University, Dr Gerry Bowler, University of Manitoba & Author of 'Santa Claus: A Biography', Father Denis O Neill, Pastor of St Martha's Parish, Morton Grove, Dr George Kazan, Oxford University School of Archaeology and the University of Turku,  Maeve O' Connell, Gerpoint Park, Kilkenny and Father Kevin Flynn, Faculty of Theology, St Paul's University, Minnesota.