This is really high class tv show and I really love it. I don't watch too many Drama tv shows, but this one was amazing. If a tv show can keep me focused for the full tv show time, that's really great. In my opinion, some of the actors roles were just a masterpieces which made an amazing impression on me. What determines the phenomenon of this tv show? It's realism, taking care of psychological probability?. It's a tv show for everyone, I'm sure you'll like it after watching.