This episode is two cases in one. The first is the Flannan Isle mystery. On December 15th, 1900 something ominous happened, leading to the disappearances of three light house keepers. It wasn't noticed until December 26th when the ship The Hesperus was taking supplies and another keeper to the isle. This case led to a poem, an opera and even a movie loosely based on it. Our second case is the murder on Little Ross Island. When a banker and his son went to the island for a picnic...