Evidently inspired by the Kim Philby case, and Dirk Bogarde would have made the perfect Kim Philby - his character and role here immediately makes you think of Philby.
In the spy world no one is what he appears to be, everyone is lying as convincingly as possible, and if they are convincing enough they have a chance of getting away with it, but these chances grow inevitably slimmer the longer they stay on as fakers. That is about the sense morale of this film, where everyone acts suspiciously from beginning to end, even Henry Fonda, who thinks he knows everything but is duped nonetheless. Philippe Noiret makes the most honest part, he is under suspicion from the beginning and seems to have accepted from the beginning to be a chronic suspect. Yul Brynner is the most convincing of all and the greatest cheat of all. The ladies are suave enough, especially Virna Lisi representing Italy in this international party, while they have very little to say, except in France - the only tender scene is what makes Philippe Noiret the most sympathetic in the cast.
This is not a thriller or any action film but almost callous in its scientific representation of an intricate kettle of spies. It tries to hit a documentary character and almost succeeds, but the story is not very credible. Kim Philby was a true story indeed, and a lot of damage he did, but here the same kind of case is exaggerated into almost absurdity. It gets too technical, and all the international actors can't save its lack of blood and humanity. It's interesting but not more than that, and afterwards you shrug your shoulders and are satisfied with not having to see it again.
