Following in the footsteps of some of Britain's literary greats, Si and Dave take a pub tour of Oxford to visit the spot where CS Lewis and JRR Tolkien drank pints together. They also drop into one of the city's oldest inns, a favourite haunt of Inspector Morse creator Colin Dexter. And while Dave goes for a punt, Si visits Brasenose College for a taste of one of their ancient rituals - Brasenose Ale.