This is likely my absolute favorite science fiction program, ranking alongside shows like Breaking Bad and Sons of Anarchy as one of my top three series of all time. Everything about it feels flawless; the actors were well-chosen, the narratives are expansive and full of thrilling instances. It’s intelligent science fiction with enough action to create a real sense of excitement. The way the show and its characters develop throughout the entire run is exceptionally effective, as the storylines consistently reinforce the underlying theme of humanity facing potential destruction. I honestly can't imagine anything surpassing this series anytime soon...

Source on TMDB