I cannot praise enough this TV series by BBC. It is not just a story of four spies who were graduated from Cambridge. It had represented the mentality of British intellectual during pre-WW2 years. They had tried their best to pursue what they believed even though the cost was their lives.
Wonderful cast by Toby Stevens and other three actors. They did act as Etonians and Cambridgers. Some may not like the previaling scene of homosexuality. However, that was how it should be both at Eton and at Cambridge.