1. Episode 1
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.
Hidden — Season 2
2. Episode 2
D.C.I. Cadi John and D.S. Owen Vaughan pay Karl Lewis a visit. Mia tries to draw Connor closer to her.
3. Episode 3
The community comes together to pay its respects to Geraint Ellis. Mia succeeds in drawing Connor closer to her.
4. Episode 4
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.
5. Episode 5
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.
6. Episode 6
DCI Cadi John and DS Owen Vaughan succeed in apprehending Mia, Lee and Connor, but there is only a hollow sense of victory.