TUC is one of the action-supernatural dramas that I would recommend to anyone. From the beginning till the end, the storyline was written flawlessly except for the ending which may look slightly different (Some comments said they changed the writer in the last few eps because of conflicts, idk much about that). Furthermore, the drama's highlights were the cast's performance and the chemistry between each character. Even the antagonists did an outstanding job. I was so impressed by Lee Hong Nae's acting. I hope to see him more in the future. And as for Its OSTs, they were average for me apart from Meet Again by Kim Sejong and No Problem by Dvwn.

So overall, you MUST watch it at least once!! Don't miss out on such an action-supernatural pack!!