I've been queuing this to watch every night for a couple of weeks, and I just can't make myself do it. It started strong, but by episode 10 there has been enough silly nonsense masquerading as a plot that I just cant manage more. I have been a sci-fi and time travel fan forever, but with very few exception (so few I can't think of any right now) K-drama just doesn't handle this stuff well. The best performance in the whole thing is Seong Dong Il, who always brings it. I think the writing went astray, and the direction got flatter and flatter. Well, take your chances, some people like it.