Guest Stars Lily Loveless as Anna Sophie Wu as Jay Robbie Gee as DCI Armstrong Francis Magee as Dr. Tremlett Theo Barklem-Biggs as DC Firth Chris Mason as Steve Jenn Murray as Natalie Ruth Gemmell as Alice Joe Dempsie as John Ian Hanmore as Polus Lloyd Hutchinson as Superintendant Clement Craig Conway as Phil Karl Collins as Higgy Genevieve Barr as Maddy