Guest Stars Kelly Macdonald as Karin Parke Benedict Wong as Shaun Li Vinette Robinson as Liza Bahar Faye Marsay as Blue Colson Leonie Elliott as Fiona, Clara's Flatmate Adrian Lukis as Home Secretary, Alex Wallis Ben Miles as Tom Pickering Elizabeth Berrington as Jo Powers Esther Hall as Vanessa Dahl Thomas Dominique as Roadie Joe Armstrong as Nick Shelton Duncan Pow as Garrett Scholes Katherine Kingsley as Dana Costello Robin Pearce as Harry Barclay Holli Dempsey as Clara Meades Anita Anand as News Anchor Charles Babalola as Tusk Imogen Daines as MRI Technician Matheus Mirek as Delivery Man Faiza Shaheen as Pundit Jeremy Booth as Dog Walker Reon Smith Marshall as Aaron Sheen Ziggy Heath as MRI Doctor Cecilia Noble as Dame Patricia Lamarr Jonas Karlsson as Rasmus Sjoberg Michael Bott as Inquiry Officer James Larkin as Simon Powers Matt Forde as Pundit Jane Bertish as Head of MI5 Georgina Rich as Tess Wallender Tom Ashley as Paramedic