After the Party sounds interesting, I've seen a few adverts for it that were a game of spot the actor I recognize from other New Zealand or Australian tv.

There's something about the slow, plodding nature of Unforgotten that I really like. It doesn't rely on dramatic interviews with suspects or chases, just methodical police work. That being said, I agree about the various characters feeling more like mouthpieces for particular ideas (or ideas being critiqued) rather than actual characters.