The Third Day

Series premiere. After Londoner Sam rescues a young girl in the woods, he takes her home to the mysterious Osea Island.

Plagued by a disturbing dream, Sam awakes to find himself in a compromising situation and, having missed the morning crossing to return to the mainland, spends the day trying to learn more about the islanders. After a series of terrifying events leaves him shaken, Sam plots a way off Osea, but is convinced to stay put as the islanders prepare for a dry run of their big event.

Sam discovers the truth about his connection to Osea Island and fights to escape.

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

As the islanders prepare for a fateful birth, Helen reveals her true intentions in coming to Osea and, after joining a search party, is pressed on her past. A peculiar girl befriends Ellie and offers to take her to a mysterious place closed off to outsiders.

As a battle for power comes to a head, Helen fights to protect her family; tensions come to a dramatic conclusion.