Sorry, but it is the leading man who mainly disappoints. David Tennant is totally miscast and is not helped by a poor script, awash with clichés.
I have been to Warsaw three times and there was more tension in the air during my visits than here with spies all over the place.
It may have worked with a different lead, as Tennant sleepwalks his way through the scenes and physically has an uncanny resemblance to John Laurie when playing the crofter in the original version of the 39 Steps.
When he twitches those eyebrows he also looks like a mad scientist rather than the smooth Frenchman tempting every woman from Paris to Warsaw to jump into bed with him. Add to that a non-existent personality and you are left with a problem.
There is absolutely no chemistry between Tennant and Janet Montgomery who is very unenthusiastic throughout. Some decent efforts by a few of the supporting cast, but poor old Julian Glover was given a bad hand with some awful lines.
And the continual movement from Paris to Warsaw and back again several times over was very confusing
Sadly quite ridiculous.