Sian Reese-Williams DI Cadi John Actor Rhodri Meilir Dylan Harris Actor Sion Davies DS Owen Vaughan Actor Gillian Elisa Iona Harris Actor Elodie Wilton Nia Harris Actor Mark Lewis Jones Endaf Elwy Actor Gwyneth Keyworth Megan Ruddock Actor Lara Catrin Lea Pryce Actor Owen Arwyn Alun Pryce Actor Lowri Izzard PC Mari James Actor Garmon Rhys PC Ryan Davies Actor Victoria Pugh DSI Susan Lynn Actor Sarah Tempest Alys Mitchell Actor Lois Meleri-Jones Lowri Driscoll Actor Aaron Anthony Prison Guard Actor Nia Roberts Elin Jones Actor Rhodri Sion Ieuan Rhys Actor Ian Saynor Huw John Actor Ed Talfan Executive Producer Mark Andrew Executive Producer Hannah Thomas Producer Chris Forster Director