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 Bradley Freegard as Evan Howells Catherine Ayers as Lisa Connors Alex Harries as Arthur Davis Demi Letherby as Alys Howells Lacey Jones as Megan 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 Rebecca Harries as Hannah Lewis Rhian Blythe as Anya Flye 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