DCI Cadi John and DS Owen Vaughan succeed in apprehending Mia, Lee and Connor, but there is only a hollow sense of victory.

Hefin discover Sion Wells' body at the petrol station and now D.C.I. Cadi John and D.S.Owen Vaughan have to deal with two separate murders.

The police finally succeed in getting the required information and this leads to some explosive events.

Will Cadi and Vaughan catch their man in the last in the series?

DCI Cadi John has to release Karl Lewis because of a lack of evidence. Mia, Connor and Lee cause trouble for Hefin, Beca and Sion at the petrol station.

When the body of an old man is discovered in a house on the outskirts of Blaenau Ffestiniog, D.C.I. Cadi John and D.S. Owen Vaughan are called upon to lead the investigation.

Iona's temper worsens as she punishes Nia and the police visit Dylan to question him.

The body of a young woman is found in a stream. DI Cadi John a DS Owen Vaughan investigate her identity.

Alun Pryce's anger boils over and he lashes out at a drug dealer, while Cadi and Vaughan take a step forward in their investigation as they visit a local reclamation yard.

Cadi and Vaughan bring Piotr Korecki in for questioning. Will he talk?

Cadi and Owen investigate a possible link to another girl who disappeared. Megan hides her difficulties from friends and family. Dylan takes an interest in Lowri.

Sion loses his job and his temper. Cadi and Vaughan pay Mair a visit at the farm.