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.
1978
1997
2022
2021
2005
2002
1995
2000
1956
2012
2016
1986
1976
1991
1974
2013