Guest Stars Pooky Quesnel as Louise Wilson Leon Harrop as Ralph Wilson Matt Greenwood as Tom Clarke Travis George Smith as Mark Berwick Daniel Cerqueira as Dr. Graves Craig McDonald-Kelly as Gary Mallard Emelia Rae Levy as Emily Scott Lucy Gaskell as Sophie Berwick Anna Koval as Holly Jude Akuwudike as Vincent Daniels Tigga Goulding as Nurse Hannah Jeanette Percival as Chemist Assistant