Realistic espionage thriller

Rating: 9/10 (4 May 2014)

I believe the relative underrating (average 7.1) is owing to the complexity of the plot and lack of gratuitous action. Looking at some of the reviews, it is clear how many people are indoctrinated by the usual vacuous action films that occupy the mainstream of this genre.
Those with a brain will rate this higher! The cast is top tier, the plot realistic to the max - clearly inspired by the uncovering of real traitors that took place around this time. The music is moody, atmospheric, appropriate and delicious. It may seem tortuous to the average viewer, but that is the price of realism. And if realism is what you crave then there could be no other way to make this film.
The cold war was certainly the most intriguing in espionage history and this must be the best rendition of that period.
Although Gary Oldman and Colin Firth take the top billing, there are also excellent performances from others, including John Hurt and Benedict Cumberbatch.
A unique achievement!