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.
Casts:
Benedict Cumberbatch, Max Beesley, Robert Carlyle, James Lance, Geraldine James, Paul Higgins, David Harewood, Kieran O'Brien, Christopher Fulford, Emil Hostina, David Calder, Eva Birthistle, Anamaria Marinca, Rupert Procter, Ovidiu Niculescu, Alex Caan, Nicholas Sidi, Tom Fisher