Sian Reese-Williams DI Cadi John Actor Lois Meleri-Jones Lowri Driscoll Actor Rhodri Meilir Dylan Harris Actor Sion Davies Owen Vaughan Actor Lowri Izzard PC Mari James Actor Garmon Rhys PC Ryan Davies Actor Victoria Pugh DSI Susan Lynn Actor Ian Saynor Huw John Actor Rhodri Sion Ieuan Rhys Actor Nia Roberts Elin Jones Actor Megan Llyn Bethan John Actor Ioan Hefin Matthew Actor Owen Arwyn Alun Pryce Actor Lara Catrin Lea Pryce Actor Mali Ann Rees Ffion Actor Gwion Aled Williams Tomos Elis Actor Elodie Wilton Nia Harris Actor Melangell Dolma Sam Shepherd Actor Morfudd Hughes Ruth Driscoll Actor John Pierce Jones Bryn Roberts Actor Wyn Bowen Harries Aled Driscoll Actor Ed Talfan Executive Producer Mark Andrew Executive Producer Hannah Thomas Producer Eric Styles Director