A big Thank You to all of you here who recommended The Americans. My wife and I have binged on the first 4 seasons in the last few weeks, and are totally taken by this excellent series.
It was unavailable for current viewing in our area, but it turns out that it is available on DVD from the local public library! Unfortunately, we are 73rd in line to get Season 5, so there would have to be a delay prior to us seeing it, but we're going away for 4 weeks on holiday in a few days anyway so this all works out for the best; we might be able to get it as soon as we return home. It's almost like someone's keeping an eye on us to make sure this happens.