GREAT acting. The episodes are mostly monologues (the fictional premise is that they're found recordings), but so moving and delivered with such passion that they are most compelling. However, the best episodes are the ones where there's actual dramatization and the characters are together in a room, like in a meeting or in the interrogation room (I especially loved episode 10, so tense!), and I felt the ending was a bit underwhelming. I don't know why my favourite character, DI Nowak, was completely left out of the last episodes.