S1 E4 ∙

Now posted to the United States, Maclean is able to pass nuclear secrets on to Moscow, and as a result the Soviets are able to detonate their first atomic bomb.


Contains Strong Language and Violence

Series Selector for Cambridge Spies

All episodes for series 1 of Cambridge Spies

S1 E1

Four young men meet in Cambridge; together they conspire to change the world for the good.

S1 E2

The four spies must bury their left-wing pasts and become part of the Establishment.

S1 E3

Donald Maclean falls in love with an American woman, but makes a shocking confession.

S1 E4

Now able to pass secrets on to Moscow, it's not long before the CIA suspects Maclean.