This show is a gem, though it could easily slip under the radar, with the time and place it's broadcast....so look it up.
The characters are established in the first episode, meaning whose the darker one, or the smarter one. But I can say it doesn't follow that particular formula, they're both relatively smart and witty, and they both can be dark, strangely enough the smarter and moralist one of the pair seems to have a darker side. Though the carefree dumbed-down one is slightly cynical. There partnership can go in any direction which is the appeal with most programmes, though what makes it interesting is they are not two singletons thrown together; one is married and the other single and proud.
The cases though not exactly 'Sherlock calibre' they are smart and flow, and leave me surprised at every new turn....meaning the 'Oh yes...but of course.' moments.
The acting is good, the comedy good, the drama good. The number of episodes.....needs more.
