Seasons & Episodes
Season 1
6 episodes
E01
Friday - The Father
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 difficult to escape.
E02
Saturday - The Son
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' beliefs. After a series of confusing and terrifying events leaves him shaken, Sam quickly plots a way off Osea with Jess, but is convinced to stay put as the islanders prepare for a dry run of their big event.
E03
Sunday - The Ghost
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.
E04
Monday - The Mother
Helen surprises her two daughters, Tallulah and Ellie, with a trip to Osea Island for Ellie's birthday. After finding that the cottage she booked is suspiciously no longer available, Helen scours the island for a place to stay, but finds resistance at every turn.
E05
Tuesday - The Daughter
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.
E06
Last Day - The Dark
With a battle for power brewing, Helen comes face to face with what she's been searching for since arriving on the island. When the sisters are separated, Tallulah witnesses a gruesome act of violence, and Ellie learns of their mother's hidden agenda. As tensions reach a fever pitch for all those on Osea Island, Helen and her girls make a desperate final attempt to escape.
Jude Law
as Sam
Katherine Waterston
as Jess
John Dagleish
as Larry
Mark Lewis Jones
as Jason
Paddy Considine
as Mr. Martin
Emily Watson
as Mrs. Martin
Freya Allan
as Kail
Börje Lundberg
as Professor Mimir
Naomie Harris
as Helen
Jessie Ross
as Epona
Richard Bremmer
as The Father
Nico Parker
as Ellie
