If you like detective/crime shows "Ojciec Mateusz" is good.
And Kryminalni
en.wikipedia.org/wiki/Kryminalni
I still wish that they had made more series, but they probably ended it at its peak (which is the best way to go).
I have the whole series on DVD, fortunately.
Something for everyone who likes cop/crime drama - gun-totin' cops, SWAT teams, car chases, evil gangsters who look like Warsaw cabbies, unusual and bizarre crimes, hot Polish women (including the kind of Polish women a lot of PF members love to hate, lol), and shows a side of Poland which the average visitor will never see. It's a Polish "CSI", I suppose.
But I have no taste in TV anyway (I watch stuff like "Ukryta Prawda" and "Sędzia Anna Maria Wesołowska" ffs lol) so I'll leave it up to you, haha.