Abysmal; amateurishly produced and hopeless performances from most of the cast, with the exception of Shaw, Stevenson, and Dobson, who add a touch of class. Many of the actors really should be in a different job, and the dialogue is staccato and garbled. The police officers are unconvincing (particularly Ms Mackie), their procedures and interviews are unrealistic, and the main thrust of the series seems to be sexuality. Because of the series-makers obsession with the main character's homosexuality perhaps its genre should be re-titled; as a police drama it fails miserably?
We binge watched the four episodes, mainly because (as you do) after one we felt compelled to see the conclusion, however badly the story was told. We now regret watching it at all, and I advise you not to bother.