When you first start watching this show, you think what kind of cheesy Sci-fi nonsense have I signed up for? Where are all the Avengers!? BUT if you are patient and stick it out past the first season, you are in for some of the BEST TV you've possibly seen and definitely in the Sci-fi/Superhero genres!! This show only gets better as it goes on, and the last 2 seasons are especially gripping and exciting! I literally binge-watched the last season in under 48 hours. I'm really sad I've finished it now, but I am SO HAPPY I watched it. Great ending to a GREAT SHOW!! I cannot recommend enough!! ENJOYYYYY!!!