It is quite confusing to watch the watcher. However, I can guarantee it is really amazing. If you like story like this, investigation on those kind of officers, then you realize this story is totally showing the true color of those people. You can already detect who is the bad one from episode 1 (if you are good enough). Yet, this story will go into spiral ways to get you confused until the end. I stick with the actors until the end, so I am quite happy with the ending. Not really good for those who have heart attack since some story line might get you shocked out of the blue. Also, frustrated. Yet, you can have faith that the whole things will be revealed in the end. They actually did a good job in untangling the spiral so that you can know the truth behind it. You will get shocked that the whole system is a mess up system. Take a look. OCN is really good. For the first time, they actually go to spiral movements and then untangle the rope. In watcher, they did perfectly well with quite adorable ending. So, take a peek. You won't regret it.