Guest Stars Kingsley Ben-Adir as Dr. Marcus Summer William Ash as Linus Campion Clive Russell as Allen Barnes Kellie Bright as Vanessa Barnes Richard Dillane as Will Peyton Robert Morgan as Donald Colley Lisa Kay as Clara Peyton Anna Francolini as Bella Colley Co Starring Charlotte Hope as Saskia Barnes Souad Faress as Eve Jamshidi Connie Walker as Bailiff Greg Patmore as Terry Caolan Byrne as Eric Hurst Flo Wilson as Social Worker Aiden Nord as Louis Barnes