I have to say, I think I liked the stories in season 1, there seemed to be more variety. In season 2, the whole time was spent looking for the evil "man behind the curtain". I found it somewhat unbelievable that the main bad guy could have absolute control over everything, including all surveillance, CCTV, etc. And then at the end, he just gave away that he was the killer.

My favorite character was still Myung Pil. I loved his relationship with Ho Gae. This was even more spotlighting Ho Gae being the smartest person in the room, which is a little tiresome.

I still can't believe that they killed off Do Jin. I was hoping we would see more bonding between him and Ho Gae.

This would have been much better without the romance. It felt rushed, forced, and I didn't feel any chemistry between them. Seol actually seemed to have more conversations with Se Jin than she did with Ho Gae! I think the drama would have been at least as good without the romance.

Jeon Sung Woo as Han Se Jin was excellent...enough said.

I also loved Oh Eui Shik as Do Ha. With his behaviors and mannerisms, I was never quite sure if he was one of the bad guys or not. I really enjoyed the collaborations he had with Ho Gae.

I know that a lot of people complained about Baek Eun Hye as Sam Soon, the scientific investigator, but I really enjoyed her. She had a different sort of energy than the rest of the cast, and that added a beat of comedy that allowed you to take a breath from all the action.

I think the highest praise I can give this drama is that I didn't need to fast forward through anything. There was a ton going on and it was practically nonstop.