The most underrated show. One need to understand the complexity of human psychology and different morality to really understand this story. It shows a beautiful portrayal of how life is not always black or white, good or evil, it enhances the grey areas of life and survival. The decisions we have to make in difficult times for the good of some people might be catastrophic for others. The way this show emphasises that "there are no good guys", "who we are & what we need to do to survive are different things" and the fact being a leader is very difficult journey is beautifully implied. And with sci-fi, apocalyptic genre, sets the series apart and the best one I've ever watched.