I've only seen this show on PBS and have not sought it out other places (Netflix, library DVDs, etc.) to try to enjoy it slowly like some others here. It's nice when my DVR randomly shows a new episode and I get to be surprised with something new to watch, particularly when there's nothing else on TV. However, I have definitely missed a lot of episodes this way and watched several out of order. At some point I will have to try to go back and fill in, if I can even remember what I've seen.
Anyway, PBS just started the John Barnaby episodes. Like others, I have not liked the John and Ben interactions yet. It seems like they've had Ben regress in order to make John look even better. I remember Ben jumping to conclusions and making silly mistakes when he was first learning, but I thought he had definitely improved. Meanwhile, interesting storylines for the first two episodes. Death in the Slow Lane and Dark Secrets. The murderers in both are elderly men (though in the first, he was young when he first committed murder). And both episodes feature either actual incest or what would be incest if it wasn't for "Daddy" not actually being Daddy. Definitely an interesting start for John.