The four-part series will follow the aftermath of the shocking murder of a seemingly perfect family at the hands of one of their trusted friends. The small Scottish town of Kirkdarroch is rocked by the incident, as mistrust and suspicion begin to run rife.

David Tennant (Broadchurch) plays Tom, a local GP and respected member of the community, who is married to local primary school teacher Kate, played by Anna Madeley (The Crown). Both lovingly care for their three young daughters.

Kate’s close friend and confidante Jess is played by Cush Jumbo (The Good Fight). Having lived most of her life as an outsider and unable to settle down, she finally found her match in Police Sergeant Steve, played by Matthew McNulty (Versailles), and decided to move up to Kirkdarroch six years previously. The couple’s happy marriage is put through its paces by their struggle to have a child. 

Deadwater Fell forensically unpacks the two romantic relationships, while also exploring the nature of female friendships to demonstrate that even the closest of friends have secrets.

The series is directed by Lynsey Miller (The Boy with the Topknot) and produced by Kudos.