Guest Stars Oscar Unsworth as Rhodri Howells Harry Unsworth as Rhodri Howells Mark Lewis Jones as Steve Baldini Hannah Daniel as Cerys Jones Eiry Thomas as DI Susan Williams Aneirin Hughes as Tom Howells Lacey Jones as Megan Howells Demi Letherby as Alys Howells Bradley Freegard as Evan Howells Suzanne Packer as Delyth Lloyd Catherine Ayers as Lisa Connors Alex Harries as Arthur Davis Anastasia Hille as Gael Reardon Martha Bright as Angie Baldini Rhashan Stone as DI Laurence Breeze Aimee-Ffion Edwards as Madlen Vaughan Brochan Evans as Dyfan Vaughan Steffan Rhodri as Judge Gwyn Daniels Rhian Blythe as Anya Flye Alun ap Brinley as Geraint Jernigan Nia Roberts as Saran James Iestyn Jones as Emrys Huws Matthew Raymond as Prosecutor Francesca Dimech as Teacher Jâms Thomas as David Maitland QC