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