The One That Got Away stars Elen Rhys (The Mallorca Files, Craith/Hidden) as DI Ffion Lloyd, who teams up with her former lover, DS Rick Sheldon (Richard Harrington, Y Gwyll/Hinterland), to investigate the murder of a nurse in a Welsh seaside town.

Written by Catherine Tregenna (Law & Order UK, Lewis, DCI Banks), and directed by Sion Ifan (Y Goleudy), this psychologically driven thriller delves into the complex relationship between Rick and Ffion as they confront not only a killer but also the unresolved issues of their past. The murder stirs up old wounds in the small community, casting doubt on a historic conviction and raising the chilling possibility of a copycat killer. The series offers a forensic examination of a town, a killer, and a love affair – both past and present.