In episode 2, The Son, Sam and Jess spend another day and night together on Osea Island. We learn more about Jess’s situation with her daughters and the death of Sam’s son. Sam visits the island’s historian to learn more about local customs, then in the evening, he and Jess take part in a dry run of the upcoming festival.
It’s all perfectly normal and nothing strange happens at all.
The episode begins with Sam’s nightmare from episode 1, which could be a recurring dream. Sam is in a moonlit, open field. He’s not trapped or encumbered- maybe he wishes he still was. In the distance, he sees the boy through a rounded opening in a wall of forest branches and greenery. As Sam calls out for him, the boy runs away and disappears through the portal, into whatever realm is on the other side- purgatory, death, uncertainty, H*ll.
This is a living wall, instead of a wall of stone, suggesting that some part of Sam hasn’t accepted his son’s death. It’s also a reminder that the islanders inherited the Druids’ belief in reincarnation, with its fluid boundaries between life, death and rebirth. Death is not necessarily an impenetrable wall here.