It's a very detailed documentary with informative interviews, clips and great graphics. However, the series could have been done in maybe 2 episodes. Everything is repeated constantly, including graphics shown numerous times and even the graphic saying exactly what the interviewee says seconds later. There is numerous repeated descriptions of the different names of the killer and years they operated AND how many offences they'd committed. It would have been so much more impactful if they had kept it simple. It's wholly unnecessarily done - so it's informative and interesting but it drags on far too long!