Compelling viewing to the stomach-punching final scenes

UKTV’s Top of the Lake managed to end with both a bang and a whimper – the whimper being from viewers who had finally managed to persuade themselves that Al the policeman (David Wenham) was a good guy after all. It turned out that he was unimaginably worse than the series’ ostensible villains, the brutal alcoholic drug lord and suspected child-rapist and his pitbull sons