Kelly Reilly, Jonathan Pryce & Rafe Spall to Star in 'Under Salt Marsh'

With production now officially underway in Wales, Sky has firmed up the cast of its upcoming limited series Under Salt Marsh. The crime drama is set in the fictional Welsh town of Morfa Halen, a tight-knit community precariously located between towering mountains on one side and the swiftly encroaching sea on the other, an ever-changing environment that threatens its very existence.

The six-part series follows the story of Jackie Ellis (Kelly Reilly), a former detective turned teacher who discovers the body of one of her young pupils on the eve of a once-in-a-generation storm. Her former partner, Detective Eric Bull (Rafe Spall) is tasked with leading the investigation and is convinced that the murder has ties to the cold case that once cost Jackie her job. The two must reconcile long enough to track down the truth before the storm breaks and washes away any remaining evidence.

“Under Salt Marsh is a crime thriller set in a community deeply connected to its environment, and interwoven with the heartache, fears, dreams, and secrets of its people," series creator Claire Oakley (Culprits) said in a statement when the series was first announced. "At the heart of it all is Jackie, a character who embodies the wildness of the place we're depicting. She's free-spirited, compassionate, and determined, with a steely resolve that makes her truly of the land. We're absolutely thrilled to have Kelly Reilly bringing Jackie to life.”