Made in 1969 this adaptation of a Le Carré novel isn't faithful to every element of the original book, and is heavily influenced by other contemporary films.
This means it isn't quite as uniformly bleak as many other Le Carré adaptations but depending on how you take it, it is perhaps hard to really believe in or sympathise with any of the characters. This is despite some pretty good performances by some of the lead actors.
What is perhaps missing is the clever editing, taut direction and sheer screen presence that (say) Michael Caine brings to the Harry Palmer movies (even though the plots of those are not exactly uniformly brilliant) or Richard Burton brings to "the spy who came in from the cold". Those movies stand head and shoulders above this.
Technically this film is well-photographed and the dubbing is well done too; however it is perhaps understandable if the pace of the film wanders, given that it looks a lot like they decided to shoehorn various sequences into the plot purely for stylistic reasons.
Some of the criticisms in the other reviews here are spot on and others are (IMHO) thoroughly misplaced; no spoilers here so you will have to work out which for yourself. I guess it is a bit of a curate's egg, this; "good in parts". Therefore if you approach it with suitable expectations you will probably find enough things about this movie to like to make it worth watching.
Overall this film probably isn't as bad as the knockers would lead you to suppose and nor is it as good as the 'ten' folk make out either. It is certainly an interesting period piece but it is also a little more than that too, so it gets 6/10 from me.
