Watching Close to the Enemy by Stephen Poliakoff (love all his stuff). If you like Foyle's War you'll love this. Set just after the Second World War it's about a British agent trying to get a German jet engineer to work for the British. Throughly enjoyable.
http://www.imdb.com/title/tt4696944/
Over the years, I have seen some of Stephen Poliakoff's stuff (and have liked what I have seen), but not "Close to the Enemy". I take it that you recommend it?
As for Foyle's War - I don't just like it, I love it.
In fact, it is one of the very few programmes I will watch again, and again, and is a series where I will readily watch repeats, whenever they are shown if I am around.
Still no Foyle's War. At this rate, I may wait until Christmas. On the other hands, I've cracked open my Mission Impossible Set. Got a few minutes into the first DVD before being interrupted. That was yesterday evening. By the time I was done, I was too tired to keep my eyes open and went to bed. Will have another crack at it tonight.
Seriously, I recommend it; strongly, passionately, seriously.
One of my all time favourites.