By the end of season 4 I tired of the contrivance laden story line. I found myself silently yelling at the screen because, once again, the most basic police procedures/common sense had been sacrificed for dramatic effect. This has nothing to do with the pace of British drama, although it is slow in comparison to U.S. police procedurals. No, my issue was with the instances of lazy writing that really accumulated by the end of season 4.
My actual rating would be season 1 and 2, ratings of 8; Season 3 and 4, ratings of 6.
