The first series was an 8, the second was 4 at best.
I wished I had read the other reviews before watching series 2 and saved myself 6 hours of my life.
The first couple of episodes were quite good but even the return of a major character from series 1 in episode 4 could not save the second series.
Slow, drawn out and characters you don't care about.
Watch the excellent series 1 and pretend the second one never happened.