My quick review:
It has potential but there are some kinks to work out, these include
They need to put Paweł Małaszyński on a diet, he's a bit too chubby for leading man.
Watch the continuity on Olaf Lubaszenko's facial hair, it seemed be moving around his face and looked like it was about to fall off in one scene.
Ditch the music in English. It's distracting, kills the mood and just..... wrong
Improve the film stock (cinematography), for something that's supposed to be so expensive it looks like it's shot on cheap video.
Give Eryk Lubos a big raise, he's easily the best part of the show so far.
Stop the dannn mumbling and speak up (a Polish friend was complaining about this too).
I'm glad to see a show like this being made, though it still needs some work. Is it inspired by the Spanish TV show Victor Ros (a detective show set in Madrid of roughly the same time).