Guest Stars Christopher Cowlin as Police Officer Owen McDonnell as Ryan Kelvin Liam Garrigan as Dr. Christy Nash Clare Calbraith as Lizzie Kennedy Ashley Walters as DI Carter Daisy Ridley as Hannah Kennedy Daisy Waterstone as Katie Bowman Haydn Gwynne as Helen Ferguson Kirsty Besterman as Amy Nash Gary Pillai as Stephen Miskin Jamie Parker as Ben Morgan Peter Vollebregt as Mark Janssen Teresa Churcher as Gemma Bowman Julie Hoult as Carol Clare Wille as Phoebe Gilchrist