If you haven’t caught up with it yet, “The Hour” is halfway over. The fourth of six hour-long episodes will play on BBC America on Wednesday, September 7th. But don’t be disheartened. You don’t want to watch it in its original transmission because it is stretched out to 90 minutes with some especially egregious commercials. If you wait a day, you can pick it up on Exfiniti “on demand” without the commercials. Start now and you can catch up on the first three episodes, and get in training for the most complex and absorbing story playing on film (and in English) at the moment.