I liked this drama pretty well, though I did have to take a couple of breaks while watching it because there were some spooky characters/scenes that made me have to put it down until the sun was up! (I'm a bit of a wimp ;P)

Overall, I think the drama was well executed and the cast was well chosen for this drama. Choi Jin Hyuk is officially one of my favorite actors (his voice is SEXY).

My only issue really was the way the time travel was presented, specifically toward the end. The way the MC, Kwang Ho, initially jumped in time was okay and didn't bother me because it was the paranormal of the drama. But unfortunately, I don't feel like the drama followed any specific logic or rules when incorporating the time travel, which made it a bit inconsistent toward the end. The fact that Kwang Ho's actions in the past when time jumping played no part in the way the future played out/changed kinda bugs me because that makes no logical sense... If Kwang Ho did *anything* in the past when time jumping that was different from history, the future would be at least slightly altered just to simply allot for those events having taken place.
Another thing that really made no sense to me was when catching the bad guy in the future --- it is important to catch the bad guy, but the REAL goal is to catch him in the PAST (back in the 1980's) so that way Kwang Ho can stop ALL the bad things from happening and hopefully having a brighter future for everyone. And while the sappy end scenes (before Kwang Ho goes back to his time) were well executed, why was everyone crying when they knew they were going to meet each other again in the past and likely live their lives together happily? Personally, I don't understand that. BUT, the acting while executing these highly emotionally charged scenes were excellent - I could truly tear-up for the characters who were weeping.

I'm sure I sound like I disliked the drama, but it *was* overall good, the time travelling was just my peeve as watching the wrap-up of the drama. Personally, I think it would have been important to see how the bad guy was caught back in the 1980's and therefore change the future for the better rather than wrapping things up in the future. I feel like it's a moot point when things *should* change when he goes back to the 80's.

I think this is a good drama recommendation for those people who love Criminal Minds who also enjoy a good science-fiction twist with the paranormal time travel aspect.