S4C has commissioned a second season of psychological thriller Cleddau (The One That Got Away) from Banijay UK indie BlackLight. Filming will begin in the Autumn, with the new series set to air on the channel in 2026.
The series is created and written by Catherine Tregenna, whose writing credits include Three Pines, Law & Order: UK, Lewis, DCI Banks, and The Bench. The production is supported by the Welsh Government via Creative Wales.
Season one introduced audiences to DI Ffion Lloyd (Elen Rhys) and DS Rick Sheldon (Richard Harrington), ex-lovers forced to work together to solve the murder of a nurse in a quiet Welsh coastal town – an investigation that unearthed dark secrets from the past with devastating consequences.
Elen Rhys (The Mallorca Files) and Richard Harrington (Hinterland) will reprise their roles in Season two, which follows another complex, twisted and nail-biting case. When a body is discovered in Cleddau River the team suspect a killer is stealing identities and luring women to their deaths through a dating website – one that Ffion herself has been using as she tries to move on from Rick, despite the fact he is now separated and single…
Season One of Cleddau/The One that Got Away, premiered to strong ratings, and has become the channel’s #1 show of 2025. It was also a hit on BBC4 228% above BBC4’s slot average.
Gwenllian Gravelle is head of Drama at S4C and says: “Cleddau struck a powerful chord with audiences in both Welsh and English. It’s a gripping and emotionally intelligent series that showcases the very best of Welsh talent, both on and off screen. We are thrilled to bring the story back for a second season and deepen the world that Cath Tregenna has so brilliantly created.”
Banijay Rights handles distribution for an English language version – The One That Got Away – for international audiences.
Pippa Considine
Share this story
