Guest Stars Gwenno Hodgkins as Elen Prosser Mark Lewis Jones as John Bell Tom Rhys Harries as Gary Pearce Ioan Hefin as Philip Hopkins Sion Daniel Young as Morgan Hopkins Richard Elfyn as IPCC Investigator John Pierce Jones as Endaf Jones Gareth Potter as Slaughterhouse Worker Manon Wilkinson as Kelsey Probert Morfudd Hughes as Judith Hopkins Rhys Bidder as Dion Hopkins Andy Sheldon as Geraint Hopkins