Guest Stars Harry Unsworth as Rhodri Howells Oscar Unsworth as Rhodri Howells Mark Lewis Jones as Steve Baldini Aneirin Hughes as Tom Howells Hannah Daniel as Cerys Jones Catherine Ayers as Lisa Connors Bradley Freegard as Evan Howells Demi Letherby as Alys Howells Alex Harries as Arthur Davis Eiry Thomas as DI Susan Williams Lacey Jones as Megan Howells Rhian Morgan as Marion Howells Celia Imrie as Rose Siân Phillips as Barnwr Owens Sion Daniel Young as Gareth Isaiah Cai Forrest as Lewis Kev McCurdy as Joe Price Keogh Kiernan as Osian Rachel Cheung as Rheolwraig Y Gampfa Marc Antolin as Athro Rhys Maria Pride as Julie Penry Matthew Aubrey as Mike Taylor
