As we’ve already discovered, 2016 was full of top-quality drama. We’ve covered the likes of The A Word and The Durrells, and detailed the successes of Line of Duty and Humans, and in this concluding part, it’s time to see out the year – with espionage, terrorism, and a whack around the head. The Night Manager The BBC lavished a huge amount of money on this production, an adaptation of a John Le…