Stephen and Yasim join forces with Russell after he saves them from an assassination attempt. They continue to unravel the mystery of why refugees like Nadir are dying from an unknown disease and why so many microbiologists are dying under mysterious circumstances. Conscious of the fact that they have been noticed they try to throw off those that have been watching them.
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 .