In 1934, four brilliant Cambridge students are recruited to spy for Russia. Fueled by youthful idealism, a passion for social justice and a talent for lying, they take huge personal risks to pass Britain's biggest secrets to Moscow.
Episode One
Season 1 • Episode 1
Episode Two
Season 1 • Episode 2
Episode Three
Season 1 • Episode 3
Episode Four
Season 1 • Episode 4
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