Placid Decent. Cop drama. An awful lot of crime on such a small island
Wife said similar about "Death in Paradise". I had to find out where it was filmed and look up their crime statistics to work out that they in fact had enough murders happen to support two series a year.
Just looked at "Shetland" and if you take the islands as a whole they have approx 60 murders per annum which makes them more dangerous than Jamaica per capita and on a par with the city of Baltimore. I guess there's fuck all else to do up there.