Season 4 episodes 9 + 10. (Spoilers)
I just finished season 4 on Netflix. I must say in episode 9 that the man who played Cetin did such a great job. Both times when he was begging for his life, were great scenes. That was really amazing acting on his part. I don't know how awards are handled for French television, but he should have won something for that episode.
In episode 10, I was a little baffled, for lack of a better term, by the Telliers (the group who wanted the 50,000) from Jorkal). No matter how valuable Pierre may have been to Jorkal, I can't see that threatening and possibly killing his lawyer would have been the best way to get their money. Lawyers are always replaceable. It just seemed an odd and unwise choice to go after Pierre. Maybe they were only trying to scare him, but there is too great a chance that Jorkal would leave Pierre to fend for himself and never pay up.
Also, just as I finally stopped seeing Laure as a disgusting human being, she cheats on Vincent, with a man who didn't respect the fact that she was in a new relationship. And in the last two episodes she's toying with both of them. :(