Kelly Reilly, best known as the fiery Beth Dutton in Yellowstone, is stepping into a new and equally intense role. Sky Studios has revealed the first-look images of Reilly’s latest project, Under Salt Marsh, a psychological crime drama set against the backdrop of a storm-ravaged Welsh town.

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Kelly Reilly as Jackie Ellis

In the series, Reilly plays Jackie Ellis, a former detective turned teacher whose life was shattered when her niece disappeared three years earlier. That cold case destroyed her career and left lasting scars. But when the drowned body of her young student Cefin is discovered, Jackie is pulled back into the darkness she thought she had left behind.

Series creator Claire Oakley describes Jackie as “free-spirited, compassionate, and determined, with a steely resolve that makes her truly of the land.” Reilly’s performance is already being praised for capturing both the vulnerability and toughness of a woman caught between grief and duty.

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A Town Haunted by Secrets

Under Salt Marsh unfolds in the fictional town of Morfa Halen, just as a violent storm brews. Cefin’s death revives memories of Jackie’s niece Nessa’s disappearance, linking the tragedies in unsettling ways.

Detective Eric Bull (Rafe Spall), Jackie’s estranged former partner, returns to lead the investigation. Together, Jackie and Bull must navigate their fractured partnership while racing against the storm that threatens to wash away the truth—and the evidence.

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A Strong Ensemble Cast

Alongside Reilly and Spall, the cast includes:

• Jonathan Pryce (Slow Horses)

• Naomi Yang

• Dinita Gohil

• Brian Gleeson

• Kimberley Nixon

• Harry Lawtey (Industry)

The ensemble promises a layered drama filled with mystery, betrayal, and revelations that test every bond in the community.

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No Release Date Yet

While Sky Studios has not confirmed a premiere date, anticipation is already high. First-look images hint at a moody, atmospheric thriller that will stand apart from Reilly’s Yellowstone persona while showcasing her dramatic range.

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Final Word

With Under Salt Marsh, Kelly Reilly trades Montana ranchland for stormy Welsh coastlines, but the intensity remains the same. This series promises suspense, raw emotion, and a chilling reminder that secrets buried in the past rarely stay hidden.