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.
No secrets are safe from the storm.
Creator: Claire Oakley · Writers: Claire Oakley, Jonathan Harbottle, Nikita Lalwani
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.
Kelly Reilly
Jackie Ellis
Rafe Spall
Eric Bull
Naomi Yang
Jess Deng
Harry Lawtey
Dylan Rees
Dino Fetscher
Gareth Morgan
Dinita Gohil
Nisha Jones
Kimberley Nixon
Shell Hill
Julian Lewis Jones
Osian Northam
Jonathan Pryce
Solomon Bevan Moody Welsh crime drama with a standout Kelly Reilly and strong supporting cast. A slow burn at first, but rewarding once it finds its pace. Highly recommend.
Strong cast, intriguing crime thriller, but as per usual let down by dreary DEI baggage. Let's start with the positives: the Welsh setting with a village under siege by rising ocean levels is a little unique. The crime drama, which spans two unsolved murders of children, is darkly disturbing with lots of twists and turns. Equally quality acting offers up well-rounded, often flawed characters. The downside is by now wholly predictable. The incessant need to ram DEI messaging down the viewer's throat. Personally I find it downright tiresome and pointless. In summary, it could have been a great series, but it's spoilt to a decent degree by the compulsion to inject woke narratives into what is supposed to be entertainment. An okay watch.
Underwhelming. What could've been a gritty crime drama with a unique setting just gets bogged down by the interpersonal drama of the two lead characters. And I honestly couldn't give a crap about either. The red head one is carrying this bigole pity party on her back cause she stupidly thought her own sister may have killed her own child. And theother dudeid an unapologetic asshole with no clear reason why. Maybe cause he's closeted? Who cares. If this was set in the 90s or aby decade earlier, I'd buy that. Tough cop character who's risen in the ranks, but homophobia and a toxic workplace keeps him from showing who he truly is. But it's not. Get over it. Love who you love and move the fuck on. I haven't watched the final episode yet but I'm hopeful all the characters die causemostof them are miserable, insufferable cunts. Except for Deng, she can live.
Under Salt Marsh is a 2026 crime and mystery TV series from the United Kingdom created by Claire Oakley, starring Kelly Reilly, Rafe Spall and Naomi Yang. It first aired on January 30, 2026. The series has 1 season and 6 episodes on Sky One. Episodes run about 1 h 0 min, in English. Audiences rate it 6.6/10 from 68 votes — mixed to positive.
“No secrets are safe from the storm.”
Under Salt Marsh premiered on January 30, 2026.
Under Salt Marsh was created by Claire Oakley.
The main cast includes Kelly Reilly, Rafe Spall, Naomi Yang, Harry Lawtey and Dino Fetscher.
Under Salt Marsh has 1 season (6 episodes). Status: Ended.
No streaming service lists it for US yet. Add it to your watchlist and check back — availability updates regularly.
It holds an audience score of 6.6/10 from 68 ratings, so fans of crime and mystery titles are its best audience. Read member reviews below or add your own.
Every episode's audience rating at a glance — find the best (and worst) episodes before you binge.
| E1 | E2 | E3 | E4 | E5 | E6 | |
|---|---|---|---|---|---|---|
| S1 | 6.4 | 6.4 | 6.2 | 5.2 | 5.9 | 7.1 |
9+ Awesome8+ Great7+ Good6+ Regular<6 Bad
walesthriller