Guest Stars Benedict Wong as Shaun Li Kelly Macdonald as Karin Parke Vinette Robinson as Liza Bahar Faye Marsay as Blue Colson Elizabeth Berrington as Jo Powers Ben Miles as Tom Pickering Esther Hall as Vanessa Dahl Joe Armstrong as Nick Shelton Leonie Elliott as Fiona, Clara's Flatmate Duncan Pow as Garrett Scholes Adrian Lukis as Home Secretary, Alex Wallis Thomas Dominique as Roadie Katherine Kingsley as Dana Costello Holli Dempsey as Clara Meades Jonas Karlsson as Rasmus Sjoberg 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 Robin Pearce as Harry Barclay 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