Kelly Reilly and Rafe Spall lead Sky Original Under Salt Marsh as the full trailer is unveiled

Sky has released the official trailer for upcoming Sky Original series Under Salt Marsh starring Kelly Reilly (Yellowstone, Pride & Prejudice) as Jackie Ellis and Rafe Spall (Trying, Life of Pi) as Detective Eric Bull in Under Salt Marsh, with the gripping new crime drama is set in the fictional Welsh town of Morfa Halen.

Created, written and directed by Claire Oakley (Make Up), the six-part series opens as a once-in-a-generation storm rolls in from the sea. Former detective turned teacher Jackie Ellis (Reilly) makes a shocking discovery that reopens the wounds of a three-year-old cold case which cost her both her career and her family’s trust.

Forced to reunite with her estranged police partner Eric Bull (Spall), Jackie is drawn back into an investigation that will shake Morfa Halen to its core. Together, they must confront a community haunted by secrets and fractured by grief, before the incoming storm washes away the evidence forever.

With a stellar supporting cast including Naomi Yang (Chimerica), Jonathan Pryce (The Crown), Dinita Gohil (Treason), Brian Gleeson (Bad Sisters), Kimberley Nixon (Fresh Meat), and Harry Lawtey (Industry), Under Salt Marsh blends atmospheric crime storytelling with a deeply human portrait of resilience and community.

Additional cast includes Mark Stanley (Happy Valley, The Reckoning), Dino Fetscher (Fool Me Once, Foundation), Lizzie Annis (The Witcher: Blood Origin, Extraordinary), Rhodri Meilir (Pren Ar y Bryn, Craith), and Julian Lewis Jones (House of the Dragon, Wheel of Time).

Under Salt Marsh will launch on Sky and streaming service NOW on January 30^th 2026.

Series Credits

Under Salt Marsh is produced by Little Door Productions in association with Sky Studios. The production received support from the Welsh Government via Creative Wales. The series is written by Claire Oakley, Jonathan Harbottle (Episodes 3 & 5) and Nikita Lalwani (Episode 4). The lead director is Claire Oakley, with Mary Nighy directing Episodes 3 and 4. The producers are Scott Bassett and Emma Duffy. Executive Producers are Elwen Rowlands for Little Door Productions, Megan Spanjian for Sky Studios, Claire Oakley, and Kelly Reilly. 

For further information please contact:

jessie.elliott@sky.uk / Kwabena.agyare@sky.uk

Little Door Productions is an independent drama producer based in Wales, founded by CEO Elwen Rowlands and COO Hayley Manning. An emerging company with a distinctive creative voice, Little Door focuses on bold, authored storytelling across television and film, developing projects that combine emotional resonance, cinematic scale and a distinctive point of view. Its first series, The Pact, produced for BBC and Lionsgate, launched to strong success, becoming one of iPlayer’s most streamed shows in its release year, and was recommissioned for a second series. With its latest drama, Under Salt Marsh, Little Door builds on that success and underlines its emergence as a distinctive voice in contemporary drama.

Sky connects and entertains millions of people across Europe. At the heart of everything we do, is a belief that people deserve better. For decades, we’ve shaken up every category we entered to give people what they love, to make life a little easier and to provide great value. That’s how we bring millions of customers the joy of a better experience in TV, broadband and mobile. 

In TV, we offer the best sports coverage, unmissable TV and the smartest ways to stream and aggregate the TV you love. In broadband, we power homes and businesses, with a fast, reliable connection. In mobile, we bring people closer, with plans at unbeatable value. And now, you can even keep your home connected and protected, through our smart insurance. We design our products to fit seamlessly into your life, with service whenever and however you need it. 

That’s how we do better for customers. And we believe in better for society too. We power the cultural economy in the UK and beyond, making award-winning news, original sport, and entertainment. We contribute billions to UK GDP, creating and sustaining thousands of jobs and sharing both our journalism and our coverage of the arts, free of charge. We are cutting emissions and making recyclable, energy-efficient products, and we give back, through free internet access and digital skills for under-served communities and young people. 

Sky is owned by Comcast Corporation, a global media and technology company. 

Sky Studios is the home of Sky Original Drama and Comedy.

We develop, commission and produce unmissable programming for Sky’s customers across Europe.

Our teams partner with the best indies and talent globally, to drive creative excellence and tell original stories that are loved by audiences the world over.

Our Sky Originals include Emmy-nominated hit, Gangs of London, BAFTA-winning comedy, Brassic, Mary & George, starring Julianne Moore, The Day of the Jackal, with Eddie Redmayne and Lashana Lynch, M. Son of the Century, directed by Joe Wright and Small Town, Big Story, created by Chris O’Dowd.

Alongside Sky Original Comedy and Drama, Sky Studios is home to an in-house Factual development and production team, and some of the world’s most exciting production companies including Blast! Films, True North and Love Productions. 

We also operate Sky Studios Elstree, the UK’s newest film and TV studio with 13 sound stages, representing a significant investment in the UK and European creative economy.

(Video)