In this episode: we'll begin beneath the waters of Dublin Bay where hundreds of shipwrecks tell the story of trade, war and survival. We'll explore a largely forgotten Ireland of red-coated soldiers, barracks and military patrols, and find out what the stories of the Irish who served in the British Army tell us about our complicated relationship with the British Empire. And we'll hear about a remarkable 17th century manuscript and a telescope that may have ben made by Galileo himself.