Guest Stars Oscar Unsworth as Rhodri Howells Harry Unsworth as Rhodri Howells Mark Lewis Jones as Steve Baldini Aneirin Hughes as Tom Howells Hannah Daniel as Cerys Jones Bradley Freegard as Evan Howells Catherine Ayers as Lisa Connors Alex Harries as Arthur Davis Eiry Thomas as DI Susan Williams Lacey Jones as Megan Howells Demi Letherby as Alys Howells Betsan Llwyd as Delyth Lloyd Rhian Morgan as Marion Howells Angeline Ball as Gael Reardon Matthew Gravelle as Terry Price Richard Elfyn as DCI Huw Parry Steffan Rhodri as Y Barnwr Gwyn Daniels Glyn Pritchard as Dewi Glynn Lowri Palfrey as Erin Glynn Mair Rowlands as Carol Foster Elen Rhys as Sian Hughes Shelley Rees as DS Morgan