A terrified Yasim confronts Stephen, fearing that Michael was murdered because he was trying to prove a link between a Hepatitis B vaccine used in the refugee camps and the disease that killed Nadir. Meanwhile, Nye is out on the Afghan-Pakistan border investigating the site of Michael's death, and Russell drops a bombshell.
Elenco: Benedict Cumberbatch , Max Beesley , Robert Carlyle , James Lance , Geraldine James , Paul Higgins , David Harewood , Kieran O'Brien , Christopher Fulford , Emil Hoștină , David Calder , Eva Birthistle , Anamaria Marinca , Rupert Procter , Ovidiu Niculescu , Alex Caan , Nicholas Sidi , Tom Fisher .