In Scotland, Alice explores one of the most tantalising threads in Grail lore - the claim that the Knights Templar buried the Holy Grail beneath Rosslyn Chapel.

Professor Alice Roberts treks across Britain, decoding the truth behind its Holy Grail legends, linking Arthurian lore, sacred relics and the Knights Templar. From the Isle of Wight to Glastonbury, Oxford, London and Scotland, she meets passionate locals, unearths legends of sacred vessels and ancient cauldrons and investigates Arthur's grave, where the trail takes an interesting turn.

Professor Alice Roberts embarks on an adventure across Britain to decode the truth behind its Holy Grail legends, linking Arthurian lore, sacred relics and the Knights Templar. She begins on the Isle of Wight, exploring the story of Joseph of Arimathea and the Grail. Did Joseph bury the Grail beneath the Tor? Archaeologist Cheryl Green and Dr Andrew Boakye help assess the legend's historic plausibility.