剑河谜案 Cleddau

When police officers come together to solve a cold case, they are usually tasked with picking up a historic murder or other unsolved crime when new evidence comes to light years later.

But in six-part Welsh drama Cleddau (The One That Got Away), the cold case at the centre of the story is a romantic one, as two detectives – and former lovers – find themselves thrown back together to lead a new investigation while also facing up to their old feelings.

Combining a murder mystery with a love story, the series is set in the coastal town of Pembroke Dock where the shocking murder of a nurse opens old wounds in this small-town community, throwing a past conviction into doubt and raising the horrifying prospect of a copycat killer.

It also reunites exes Ffion Lloyd and Rick Sheldon, who are tasked with finding the killer.