Under Salt Marsh (2026) is a six-part Welsh crime-thriller series for Sky Atlantic, starring Kelly Reilly and Rafe Spall. Set in the fictional, isolated town of Morfa Halen, North Wales, former detective turned teacher Jackie Ellis (Reilly) investigates a child’s drowning that mirrors a previous, unsolved, career-ruining case, forcing her to work with her ex-partner, Bull (Spall), as a massive storm threatens to destroy evidence.
