MI5 has to intercept a Russian arms dealer who plans to pass blueprints for a nuclear device to Iran. Adam and Ana decide to bring their relationship to a close.

Harry discovers there’s a mole at large in the Grid. Meanwhile, Ros and Adam board a plane undercover in an attempt to stop Iran becoming a nuclear power.

A live TV broadcast announcing the new peace accord between the UK, US and Iran is hijacked by armed gunmen. Can Adam and Ros defuse the situation before someone’s hurt?

Ros is in grave danger after Bob Hogan discovers she’s a traitor. Meanwhile, Harry’s brought before Yalta’s chief, whose identity shocks him to the core.

Zaf and Adam participate in a mission in Tehran that goes wrong. As the investigation advances, the team realizes they’ve been lied to as to the goals of their mission.

The country faces a plague outbreak. In a race against time, the officers from Section D have to track down and quarantine everyone who might be infected, while preventing a…

A British plane is thought to have been hijacked and taken to an American airstrip. Ros is captured by the Yalta organisation when the team shows up and they learn…

As an Algerian extremist escapes his home detention, the team fears he may be plotting a terror attack on US businesses in the UK with the help of local Iranians….

In the near future, The Doctor and Clara arrive on a decrepit shuttle making a suicide mission to the Moon. Crashing on the lunar surface, they find a mining base…