This tale of how cold-war espionage continues under 'Glasnost' has a somewhat unlikely opening scenario, but then settles down to a very wordy puzzle over who is deceiving whom out of the UK, USSR and USA intelligence services. Well, of course they are all deceiving each other, but perhaps the issue is really which will will end up with their real objective achieved.
Be prepared to either pay a lot of attention or go to sleep. It's a bit unfortunate to see Diana Quick struggling with lines she clearly has no belief in, and some other good actors give an impression of having a heavy time of it. Alan Howard's crumpled cynic reappears but is even more puzzling than usual. But if you like this sort of stuff, it may be worth watching once. Set mainly in London and the US (the 'Moscow' scene plainly shot in London).