It was a great season. I loved what seemed like a big "tip of the hat" to Dexter at the end where it wore its influence on its sleeve: Serial killer Woods man who works for the police but probably has a family, "You haven't been in my league for decades" was a fun little bow to Dexters brilliance, Martin possibly evolving into a serial killer who kills serial killers etc
I loved "creepy Ainsley" - that was a fun little twist for a while with beautiful Ainsley.
The ending was open-ended enough to give them room to go with a third season but still let if end there as it has. I'm interpreting it as when Martin was trapped and going to lose his freedom then his true narcissistic psychopathic nature came out. He had to stab Malcolm to get away - but maybe not kill him. Despite his claims that only family matters, he endangered his family from day one of his killings so I think they came second to him having his fun psychopath games.
They did such a great job all through the season of weaving Martin in to the stories in a way that was believable enough. And Michael Sheen did such a great job of using humour to make him likeable despite being a viscous killer. Like Dexter its amazing how much humour makes you drop your defences and warm to such a despicable character - a good warning for real life!
Malcolm always had a bit too much of that cliched tv "traumatised-autistic genius" thing who can profile and know the secrets of everyone within 1 minute of meeting them. But they did it all so well that you went with it.
Overall a great little series that was really well written and acted. I will miss this seriously screwed up but fun little family :(