Russian names are confusing. When I got to know that this is an espionage movie and situated during cold war times, I thought this story is adapted from Ben Macintyre's book, the spy and the traitor.
In this movie the protagonist name is Penkovsky, whereas Gordievsky is protagonist in the book.
This movie is narrated from the courier's point of view. How he got into this espionage game and stick to his part well. Benedict Cumberbatch acted well.
The espionage movies directed by US have become the routine. Like it's said, the history is written by the winners. Wish to watch different versions of the same story.