It has to be said that the show has lost something since John Nettles left (there seems to be fewer of John's RSC associates that made for such surreal characters and great storylines) but this is one of the better ones since Neil Dudgeon took over the lead role (having said that, if you know the basic plots for the show then the murderer generally isn't hard to predict. It's a tradition that a Mrs. Barnaby either is involved with the plot or says something profound that leads to the unmasking of the culprit).
A good watch, and a good use of the now shorter episodes.
Review of Murder of Innocence
