In this 1970s Cold War spy thriller, Brian Cox stars as a key player in MI5's covert efforts to safeguard the nation from looming threats.

A team of experts assembles in London 1972 to investigate a devastating Sovie...
The documentary series uncovers the covert operations of MI5, Britain's domestic intelligence agency, as they combat internal threats and enemies to safeguard the nation.
In this 1970s Cold War spy thriller, Brian Cox stars as a key player in MI5's covert efforts to safeguard the nation from looming threats.
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