Watched all of the Second Series now and excellent, every minute of it. I'm really glad now that I didn't give up after the first two episodes of Season 1. Season 3 is out in the US on the 9 June 2013 but no idea how long before I will get to see it here (and they still wonder why the can't shut down BitTorrent websites.)
Anyway, are spoilers for the final episode of Season 2 appropriate here now?
I'm going to assume not, but click away now if you don't wish to be spoiled
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The true purpose of the invader’s secret weapon was revealed in a throwaway line about pointing into space - the big twist of a mysterious new species of extraterrestrial arriving in the final few seconds - is it friend or foe? Well, my enemies enemies are generally considered to be my friends.
But nothing is known about his motivations and allegiances - could he spell doom or salvation for the human race?
As for Hal becoming an unwitting pawn in the alien’s battle with the human resistance, by getting the parasite introduced in the kiss from Karen - it seemed far too easy for them to swap the role of fifth columnist from Ben to Hal within the space of an episode. It also seems unlikely, given that all that has happened to her, that Karen still resents loosing Hal so much that she focuses on him in every plan she devises. Was she such a bunny boiler before she was harnessed?