Consistently hailed as a benchmark for modern drama, award-winning MI-5 returns for a rip-roaring eighth season. As the season begins, the fallout from Russia's thwarted attack on London finds the team in a race against time to rescue Harry, who has been kidnapped by rogue Russian agents. But as they dig deeper into his disappearance, they find a trail that leads to Iraq, and a conspiracy that involves the CIA, MI-6 and some missing weapons-grade uranium. Could Harry know where it is? And how is former team member Ruth Evershed, returned to the security of MI5 having fled her new life in Cyprus, connected to it all?