annatv22
10/10Moody 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.
Reviewed on February 1, 2026
Under Salt Marsh(2026)
No secrets are safe from the storm.
6.71 season6 episodesEnded
CrimeMystery
Under Salt Marsh Synopsis
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.
Under Salt Marsh (2026) is a crime and mystery series that premiered on January 30, 2026, spanning 1 season and 6 episodes. It stars Kelly Reilly, Rafe Spall, Naomi Yang and Harry Lawtey. Viewers rate it 6.7 out of 10 across 64 ratings.
- First aired:
- 2026-01-30
- Last aired:
- 2026-02-27
- Producers:
- Elwen Rowlands, Claire Oakley, Megan Spanjian
Under Salt Marsh (2026) Trailer
Watch the official trailer for Under Salt Marsh before you start streaming.
Under Salt Marsh Videos & Clips
Official trailers, teasers, clips and featurettes for Under Salt Marsh.
Official Trailer
Trailer
Official Teaser
Teaser
Under Salt Marsh Cast & Crew
Main cast
Kelly Reilly
as Jackie Ellis
Rafe Spall
as Eric Bull
Naomi Yang
as Jess Deng
Harry Lawtey
as Dylan Rees
Dino Fetscher
as Gareth Morgan
Dinita Gohil
as Nisha Jones
Kimberley Nixon
as Shell Hill
Julian Lewis Jones
as Osian Northam
Jonathan Pryce
as Solomon Bevan
Key crew
Executive produced by Elwen Rowlands, Claire Oakley and Megan Spanjian.
Explore more Crime shows
Under Salt Marsh Reviews & Ratings
Average viewer score of 6.7/10 from 64 ratings.
MovieGuys
6/10Strong 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…
Reviewed on February 21, 2026
tender_buttkiss
4/10Underwhelming. 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…
Reviewed on September 5, 2026
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Under Salt Marsh – Frequently Asked Questions
Where can I stream Under Salt Marsh?
+
Under Salt Marsh (2026) is available to stream on Amazon Prime Video and SkyShowtime. Availability comes from JustWatch data and varies by country.
How many seasons of Under Salt Marsh are there?
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Under Salt Marsh has 1 season and 6 episodes in total, starting from its premiere on January 30, 2026.
Is Under Salt Marsh still running?
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No. Under Salt Marsh is marked as ended, with the final episode airing on February 27, 2026.
Who is in the cast of Under Salt Marsh?
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Under Salt Marsh (2026) stars Kelly Reilly, Rafe Spall, Naomi Yang, Harry Lawtey and Dino Fetscher. The full cast list with character names is available in the cast section of this page.
Is Under Salt Marsh any good?
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Under Salt Marsh (2026) is rated 6.7 out of 10 from 64 viewer votes, and suits viewers who like crime and mystery series. Reviews from viewers are collected further down this page.
Where can I watch the Under Salt Marsh trailer?
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The official Under Salt Marsh trailer is embedded in the trailer section of this page and plays instantly in your browser.