Guest Stars Harry Unsworth as Rhodri Howells Oscar Unsworth as Rhodri Howells Mark Lewis Jones as Steve Baldini Aneirin Hughes as Tom Howells Bradley Freegard as Evan Howells Hannah Daniel as Cerys Jones Catherine Ayers as Lisa Connors Alex Harries as Arthur Davis Lacey Jones as Megan Howells Demi Letherby as Alys Howells Betsan Llwyd as Delyth Lloyd Anastasia Hille as Gael Reardon Aimee-Ffion Edwards as Madlen Vaughan Rhashan Stone as DI Laurence Breeze Brochan Evans as Dyfan Vaughan Martha Bright as Angie Baldini Steffan Rhodri as Y Barnwr Gwyn Daniels Rhian Blythe as Anya Flye Rebecca Harries as Hannah Lewis Richard Lynch as Hayden Swancott QC Owen Arwyn as Shane Reardon Billy Hartman as Gemydd Carli De La Hughes as Nyrs Miguela Gonzalez as Gohebydd