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Season 1 – Under Salt Marsh

Play trailer 1:29 Poster for Season 1 – Under Salt Marsh Jan 2026 Crime Drama Mystery & Thriller Play Trailer Watchlist
Watchlist Tomatometer Popcornmeter
100% Tomatometer 6 Reviews 41% Popcornmeter 50+ Ratings
A detective-turned-teacher investigates a crime in her small town; as a big storm approaches, she must work with her estranged ex-partner to solve the case before evidence disappears.

Critics Reviews

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Graeme Blundell The Australian Feb 20
Under Salt Marsh is a bit of a slow burn, but it’s a finely crafted tonal piece, of what might be called Welsh noir, about the death of a child. Go to Full Review
Craig Mathieson The Age (Australia) Feb 4
4.5/5
I can’t remember a British show that looked this evocative – colours carry a deep resonance, while the landscape has a panoramic heft. Go to Full Review
Carol Midgley The Times (UK) Feb 4
3/5
​This ​is dour ​stuff, but while you won’t feel remotely cheered by this drama, you won’t be bored by it either. Go to Full Review
Barbara Ellen Observer (UK) Feb 4
Under Salt Marsh is elevated by a powerful cast, which also includes Mark Stanley, Naomi Yang and Kimberley Nixon, and gritty interactions. It’s also beautifully -- cinematically -- shot, capturing the drama, splendour and melancholy of the marshlands. Go to Full Review
Adam Sweeting The Arts Desk Feb 4
3/5
Location, location, location... a tangible sense of place and local identity can make or break a TV drama, and Under Salt Marsh exploits this to the full. Go to Full Review
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Audience Reviews

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Markus A @Excalibur866 Jun 7 This is not a bad series however, we do tire of the drone footage of the marshes after the first episode. The storyline can hold its own but there is a one dimensionality about Kelly Reilly’s performance, she does not stand tall amongst the other cast and shows absolutely zero spread of emotion above her ‘kicking stones’ grief stricken persona. There is an unnecessary relationship featuring Rafe Spall that bears no relevance to the storyline. Overall, it could have be done in four episodes. See more Steve T @Memetata Jun 6 Absolute rubbish in all respects. See more Glen and K @RT69201925 Jun 5 Starts off ok but by episode 4 it starts to lose it , some of the Welsh accents are cringe or none existent Kelly Ryley over acts at every turn overall a disappointment with way to many plot holes ..sorry I watched it See more Mark H @RT20439126 Jun 1 terrible, unbelievable plot. ex detective 'just happens' to walk along derelict path at night. Constantly corrects the police how to behave, yet tells the parents before police. swears every other word. Just another poor plot of detective series with the lead not being a detective. See more Christian T @Tur7on Apr 8 Not very often I say this, but ignore the audience score and go with the critic's score, superb slow burner that keeps you guessing and second guessing all the way to the end. See more Lynda H @RT89958489 Apr 5 I found it very slow and over dramatic. I was disappointed in Kelly Reilly's acting. Good plot, just not well executed. See more Read all reviews
Under Salt Marsh — Season 1

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Episodes

Episode 1 Aired Jan 30, 2026 Jackie finds the body of her nine-year-old pupil, Cefin, seemingly drowned; the discovery revives the ghost of an unsolved cold case that rocked the town three years prior. Details Episode 2 Aired Jan 30, 2026 Jackie investigates on her own, clashing with Bull. The tracks lead to a solitary beekeeper, while pain and anger explode during the funeral vigil for Cefin. Details Episode 3 Aired Feb 6, 2026 With the town turning on itself as long-buried secrets emerge, Jackie and Bull's fragile partnership is tested by a new discovery. Details Episode 4 Aired Feb 12, 2026 Jackie confronts an uncomfortable family gathering and Bull loses his cool as Cefin and Nessa's case becomes officially linked. Details Episode 5 Aired Feb 19, 2026 Floodwater isolates Morfa Halen as a new body surfaces; Bull gets closer to the truth about the illicit operation; Jackie faces a suspicious situation with explosive consequences. Details Episode 6 Aired Feb 27, 2026 During a storm, the inhabitants are looking for a missing person; bull fights for his life and Jackie is faced with a choice; Morfa's darkest secrets come to light. Details
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Season Info

Director
Mary Nighy
Creator
Claire Oakley
Executive Producer
Elwen Rowlands
Network
SKY
Genre
Crime, Drama, Mystery & Thriller
Original Language
British English
Release Date
Jan 30, 2026