Under Salt Marsh is a 65 min Crime, Mystery TV series from United Kingdom, directed by and written by Claire Oakley, Jonathan Harbottle, Nikita Lalwani.
Released on 30 Jan 2026, this 2026 production features an exceptional cast including Kelly Reilly, Rafe Spall, Jonathan Pryce, Naomi Yang, Harry Lawtey, who bring authenticity and emotion to their roles.
The story follows Morfa Halen is a tight-knit Welsh town precariously nestled between towering mountains and a fast-encroaching sea that threatens its very existence. As a once-in-a-generation storm begins to gather far out at sea, former detective turned teacher Jackie Ellis discovers the body of her 8-year-old pupil, Cefin, seemingly drowned. The discovery sends shockwaves through the community, reviving the ghost of an unsolved cold case that rocked the town three years prior - the disappearance of Jackie’s niece, Nessa, which cost her career., combining strong character development, immersive storytelling, and stunning visuals.
Viewers praise the series for its thoughtful direction and high production quality, making it one of the standout Crime, Mystery shows from United Kingdom.
Whether you’re searching for a new Crime, Mystery TV show to watch online or exploring acclaimed titles from United Kingdom, Under Salt Marsh delivers a compelling experience that blends entertainment, emotion, and artistry.