Guest Stars Harry Unsworth as Rhodri Howells Oscar Unsworth as Rhodri Howells Mark Lewis Jones as Steve Baldini Aneirin Hughes as Tom Howells Demi Letherby as Alys Howells Hannah Daniel as Cerys Jones Bradley Freegard as Evan Howells Catherine Ayers as Lisa Connors Alex Harries as Arthur Davis Lacey Jones as Megan Howells Eiry Thomas as DI Susan Williams Betsan Llwyd as Delyth Lloyd Rhian Morgan as Marion Howells Anastasia Hille as Gael Reardon Aimee-Ffion Edwards as Madlen Vaughan Brochan Evans as Dyfan Vaughan Rhashan Stone as DI Laurence Breeze 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 Billy Hartman as Gemydd Crystal Yu as Dr. Sarah Collins Rhodri Sion as Madog Jones Daniel Edwards as Gard
