All is revealed (almost). Love, jealousy, revenge, murder, the tragic history of the island, and children lost and found. A final episode with just a few loose ends and more than one character convinced that unearthly forces played a part.
Who has stolen all the mobiles and cut the telephone lines to the mainland? It seems clear that someone in the group is a killer, and does not want the others to leave. Minnie believes that she knows what is hunting her, and that it can be found in the old lighthouse.