After a group of people, who meet online, discover a bizarre graphic novel which seems to hold mysterious answers, they find themselves being tracked down by a merciless organization known merely as 'The Network'.
Cast: Adeel Akhtar, Paul Higgins, Neil Maskell, Fiona O'Shaughnessy, Alistair Petrie, Alexandra Roach, Nathan Stewart-Jarrett, Oliver Woollford, Ruth Gemmell, Geraldine James, Emilia Jones, Paul Ready, James Fox, Anna Madeley, Stephen Rea, Sylvestra Le Touzel, Ian McDiarmid
The gang face a race against time to work out who is going to release the flu, and stop them in order to prevent global disaster.
With the revelation that her father is alive, Jessica and Milner set off to find him. Arby takes Grant and Anton to a place from his past, a remote mountainside where he came as a child.
A shocked Dugdale reluctantly agrees to harbour Jessica. Jessica is searching for Ian, as is Milner who is convinced he will lead her to Carvel.
The gang are on the run and find a precocious young hacker, who uncovers the key to The Network's new plan: a real global outbreak of weaponised Russian flu that will prompt the entire world to take up their vaccine on V Day.
3 months after the destruction of the manuscript, things have been quiet for Ian, Becky and Grant. Believing the Network to be finished, they each try to resume some semblance of normality, but the Network's plan is only just beginning.
1974, England - Scientist Philip Carvel has a fateful meeting with a young woman, Milner, bonding over a shared ideology their influence on each other will lead to the creation of a virus - their solution to the world's over-population.