We explore three different German U-Boat wrecks from the First and Second World War with marine archaeologist Dr Innes McCartney. In the story of UC66, we learn how it was the first German U-Boat to be sunk by a plane. In the story of U-Boat U87 we hear how it was sunk after it was rammed by an Allied ship. The final story follows the sinking of U-Boat U480, the world’s first stealth sub.