Guest Stars Seren Letherby as Rhodri Howells Harry Unsworth as Rhodri Howells Oscar 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 Rhian Morgan as Marion Howells Angeline Ball as Gael Reardon Mali Harries as Bethan Price Matthew Gravelle as Terry Price Richard Elfyn as DCI Huw Parry Kizzy Crawford as PC Emma Jones Lowri Palfrey as Erin Glynn Glyn Pritchard as Dewi Glynn Menna Trussler as Eira Jones Pinar Ogun as Dr. Meral Alpay Gareth Jewell as Gavin John Memet Ali Alabora as Luca Samaras Macsen Mackay as Court Clerk Charlotte Randall as Young Woman Dafydd Hywel as Rev Talbot Helen Griffin as Maggie Talbot