Guest Stars Victoria Pugh as DSI Susan Lynn Garmon Rhys as PC Ryan Davies Lowri Izzard as PC Mari James Sarah Tempest as Alys Mitchell Lara Catrin as Lea Pryce Ioan Hefin as Matthew Gwion Aled Williams as Tomos Elis Rhodri Sion as Ieuan Rhys Manon Wilkinson as Sara Dean John Pierce Jones as Bryn Roberts Beth Robert as Carol Reed