Rarely does a drama come along which is original as In the Flesh. I fear that when most people hear it's about zombies they imagine it's a poor man's Walking Dead but actually the two shows have few things in common. The show is all about what happens when zombies are cured and brought back into society.
One of the one hand it is a good supernatural drama. "Rotters", as they tend to be known in this world, actually play a bigger part in the second series. There are rotter attacks and a mythology about a second rising. The whole concept is unique and the writers continually add the the actually pretty small mythos.
On the other hand though the "partially deceased syndrome" sufferers play a very real-world role. They are symbolic of any race or group of people have been segregated and made a prejudice by the majority due to fear and lack of understanding. The key point is that the undead only cause trouble when they are provoked. There are also lots of other issues appearing in the show, like extreme politics and the effect of religion.
A supernatural drama which brilliantly reflects on real world issues, In the Flesh is brilliant. The first series was good but the second series totally eclipses it. I really hope that it will get a third series.