I must confess that this was the first Otto Preminger movie I've seen, so I cannot comment it as an Otto Preminger movie, but rather just a movie among others.
I'm very much a fan of both cold war spy movies and 70/80s Great Britain, so the elements were in place for me to enjoy this. I had never heard of this (I'm yet to go through Preminger's movies) and I quite randomly picked it from the online service as it seemed pretty interesting.
And it was interesting. Very subtle and talkative, I have to say I really really liked it. The story itself wasn't too exciting, but interesting nonetheless. It's about the secret service and an apparent leak of information - possibility of double agents and so on. Very gripping, yet quite slow paced - no action. I just watched le Carre film "The Spy Who Came in from the Cold" and they are quite alike in style, altho I have to say I enjoyed this more. Even if it's not necessarily as well made, this wasn't quite as heavy-handed.
The acting is great for the most part. Nicol Williamson was a name I hadn't heard of before, but his presence really made this movie. Very understated and brilliant character, just like anyones neighbor or work colleague. There's a weak link too unfortunately and that's Iman, she's horribly wooden and unnatural in her acting most of the time.
I'm dropping one point because of sloppy cinematography too - lighting in particular and a few shots that look really staged. I'm not sure why some scenes were so horribly set up, the lights almost looked as if they just flipped a few spotlights over and pointed them at actors faces.
Despite these few flaws, it's a really enjoyable spy movie for anyone into cold war spy stories in style of le Carre etc. Grab a whisky and time machine yourself back into cold war era. This doesn't seem to be too well distributed tho so it may be a bit hard to find.