This had loads of potential but just misses the mark!
The ongoing storyline keeps it moving but each episode just lacks tension.
The locations seem to be all filmed in the same place, London has so many great little hidden places ideal for a gritty drama shame they weren't used.
Some very bad continuity issues, (cctv/npr footage we are told was taken at 22:35 but it's full daylight)
The cast by and large do a good job apart from the fake worried looks and gritting of teeth to add tension!
If your looking for a factual well researched drama then look elsewhere.
Sorry to be the barer of bad news but this doesn't "kill"