The past comes back to haunt DCI Mathias as he investigates the death of convicted killer Catrin John - could her death be linked to that of Iwan Thomas's?
Where to Watch Episode 4: Part 2
Cast of Episode 4: Part 2
Richard HarringtonDCI Tom Mathias
Mali HarriesDI Mared Rhys
Alex HarriesDC Lloyd Elis
Hannah DanielDS Siân Owens
Aneirin HughesChief Superintendent Brian Prosser
Take Plex everywhere
Watch free anytime, anywhere, on almost any device.
