I'm generally highly critical in my reviews and often can not understand why people score obvious rubbish highly. For a change, it's nice to be able to aware a series a 10.
When so many series have more holes in the pot than a golf course, it's nice to come across a gem like this which is as near perfect as one could hope for and with an excellent cast featuring a rising star in Lauren Lyle.
Yes, the point is regularly made by experts in the real police that too many roles are cast where the investigating officer is far younger than would be the case in the real life. Lauren Lyle is only 29 and hence that criticism would be entirely valid (and which has been made here by other reviewers who have completely missed the point) except for one rather key fact: she was chosen to lead the cold case investigation because she was thought a dead certainty to fail. Of course, someone that young would never be assigned to this sort of case in real life but if you don't understand why she was appointed to this case in this tv series, then you really have missed the point of the story.
Anyway, this is as close to perfect as I've seen in a while and let's hope more of Val's Karen Pirie novels can be made into television series in future years.