The third and from what I've read, last series of this off-beat Finnish-made police-procedural which focuses on the unlikely partnership between the older, recently widowed, brilliantly intuitive Sofia Karrpi and her younger, more methodical, down-the-line colleague Sakari Nurmi who together patrol the mean streets of Helsinki.
This latest 8-part series sees both of their private lives linked into the hunt for a serial killer who has time to carefully pose his victims under lights and paint nearby his signature geometric symbol. Somehow this ties into the death of Karrpi's husband years before, while Nurmi it turns out has not only slept with the first victim, when she was underage to boot, but also sees his on-off girlfriend from the previous series also die linked to the investigation.
More than that they both manage to again defy more life-threatening situations than Batman and Robin and what do you know, just for good measure, finally hook up together physically.
I found this particular narrative to possess a good deal less credibility than the previous two series as the production aimed for a misguided seen-it-all-before "Se7en"-type vibe. It was also dragged down further by continuing the back-story of Karrpi's unsympathetically-drawn super-sullen step-daughter who yet again gets drawn into an act of crime which for me only hold up the main action and who anyway disappeared from the scene long before the end without even reconciling with Karrpi.
The first series of the three screened to date was definitely the best while this over-derivative and over-written third run, where you sensed the wish to tie up the loose end to every loose end ultimately tripped over itself and served to undo, to some extent, the good impression made in those first episodes.