It's the original score! I'm not sure where they found this track because as far as I know the score has never been officially released. This is the 音楽 that plays when Sam is in his nursery and Mary checks on him.
によって Oana. The 音楽 is original score from Season 2 [heard in Croatoan- theme repeated in a couple other epis] I think it's composed によって Christopher Lennertz but it could be カケス, ジェイ Gruska.
