The Third Day

Series premiere. After Sam, a London family man in crisis, rescues a troubled young girl in the woods, he brings her home to the ominous Osea Island, where inhabitants are preparing for a curious annual festival involving the island's history. As he meets Osea's secretive locals, Sam grows increasingly desperate to return to the mainland to make an important call--but the island proves difficul...

In his quest to learn more about the islanders' beliefs, Sam has a series of haunting encounters.

Sam is shocked to learn the truth about his connection to Osea and the islanders' intentions for his future. Later, in a fight for his life, Sam tries desperately to escape their clutches and make it back to the mainland in one piece.

Helen brings her two daughters to Osea, but their trip takes an ominous turn while the family looks for a place to stay.

Helen tends to a fateful birth and is questioned about her past, while a peculiar girl rouses Ellie's interest.

Series finale. With a fractious battle for power brewing, Helen and her family find themselves trapped in the middle.