Guest Stars Esther Hall as Ellie Simm Natasha Little as Vicki Westbrook Lorcan Cranitch as Patrick McCann Benedict Cumberbatch as Jim North Emma Barton as MI5 Officer Enzo Cilenti as Carlo Franceschini Rebecca Johnson as Civil Servant Karel Roden as Miroslav Gradic Teresa Churcher as Sarah Ben Fox as MI5 Officer Martin Cole as SAS Officer Rad Lazar as Gradic Henchman Graham Christopher as George Bill Buckhurst as Bomb Disposal Officer