I found this film irritating and think I know why - it is a romance padded out to try and pretend to be something more, with a confusing flashback spy story. It seems the film's writers and director is also its author, a rather privileged south Asian British woman helped by her same sex spouse who is also a film producer, Hmmm. Always rings alarm bells when the screenwriter and director also wrote the novel...
Some interesting bits but a rather cartoon character version of life in the USSR with clunky dialogue an a wafer thin plot.
It was so-so but John Le Carre or Fred Forsyth this ain't. Watch THE AMERICANS DVD box set instead or a film based on real cold war thrillers.
It is a mills and boon romantic story really. 3 stars max. Some nice falling snow...