What I liked:
1. Cho Seung-Woo was effective and mesmerizing as the ML. But Park Shin-hye was stiff and mechanical as a female fighter, assassin, and sharp-shooter. She was supposed to be something of a bada$$. I kinda liked that about the character. And I was especially relieved that she was a mature adult in this series-no baby-talking, toddler-like female lead who collected stuffed animals and lisped.
2. The supporting actors did a good job overall--I was never bored when they were on screen. Chae Jong-hyeop was endearing, but I wish he'd had more of presence and had more to do in this series. I also really enjoyed the actor who played President Park and the actress who played Bing Bing.
3. The pacing was good, the camera work was smooth, and the CGI was effective.
4. The plot was exciting and unpredictable.
What I didn't like:
1. The time travel was confusing. For example, I didn't get the double role of Kim Seo-jin, who in the beginning played a young psychiatrist, but also later portrayed "Agnes" an old woman who cared for orphaned time travelers. For her second stint, the same actress was attired in a frumpy dress, old-lady shoes, had her make up removed, and sported an unflattering hair-do/wig. Was she supposed to be fifty years old, or what? Was the time machine able to send civilians forward in time? Why was no one else older-just her? It made no sense.
2. I was also confused by the bunker. With Han Tae Sul looking for his brother, hunting for a would-be murderer, trying to design a working time machine, dealing with the impending end of the world (or maybe just the end of Korea?), and saving the endlessly distressed Seo Hae from her various misadventures--when did the poor guy have the time to draw up architectural plans, purchase land, refurbish the bunker, and stock it? And who was it for anyway? He talked as if he was building it for nine-year-old Seo Hae and her folks, but then he locked the adult Seo Hae in-and there seemed to be a chance that she'd be staying there quite awhile.
3. Speaking of the brother, what was he doing floating outside the plummeting airplane as depicted in the first episode? Was that ever explained?
4. What caused the end of the world? Apparently incoming missiles destroyed South Korea. No one in the public seemed to have any warning that this calamity was about to occur. It's true that Sigma talked at one point about downloading a huge missile-but where was he going to send it? To the United States? To just anybody? He obviously never completed that plan, so why was Korea being attacked-and by whom? Did I miss something?
4. Thin, slight, malnourished Seo Hae kept beating up and killing legions of bad guys-often forty at a time--both in the future and the past. Five or six times, gangs of trained assassins or soldiers surrounded her and five minutes later they were all dispatched to the great beyond. Once or twice she got a minor wound or scratch, but this babe could have overcome an army of terminators.
5. As for the romance, Seo Hae didn't seem to like Han Tae Sul all that much. She took every opportunity to punch him, insult him, scowl at him-plus she refused to answer most of his questions. He, on the other hand, couldn't get enough of this unpleasant woman. She warmed up a little at the end-but not much.
