It's an intriguing story about the potential end of the world, but rather than zombies and post-apocalyptic sci-fi, it takes a much deeper look at human nature and what's required to form a functioning society. Thoroughly enjoyed it, liked the fact they explained the origin during the first season, and the characters are all interesting in their own way. And there's no obvious protagonist, so keeps your emotions open (although there are a few distressing and squeamish scenes which some people may find disturbing, but add to the drama and storytelling). Thumbs up from me, can't wait for season 2!