Guest Stars Annes Elwy as Greta Dylan Jones as Young Joe Catherine Ayers as Sali Ella Peel as Ela Morgan Hopkins as Dai Rees Sian Reese-Williams as Caryl Ioan Hefin as DCI Parry Ifan Huw Dafydd as Wyn Aneirin Hughes as Gafyn Aled Bidder as Rhys Mari Ann Bull as Young Shelley Rhian Blythe as Shelley Hannah Daniel as Izzy Delyth Wyn as Eilis Aled Pugh as Ian Lisa Palfrey as Nina Hannah Mary Dando as Alana Mabli Jên Eustace as Young Izzy Gwydion Rhys as PC Gwyn Jones Dion Lloyd as Chris