I was really looking forward to watching this drama. I really enjoyed Lee Joon Gi in what I've seen of Time Between Dog and Wolf. I didn't know any of the other actors except Lee Soo Hyuk. The story was OK. I think it could have been shorter and there really wasn't enough going on to sustain the length of the show. If you like a vampire story it's solid, but it had so much potential. There are plenty of slow episodes that could have been done away with and we could have more information about Kim Sung Yeol at the end. Lee Soo Hyuk was excellent. I've only seen him in HSK and I hated him, but this role really suits him and he revels in it. If you're a fan of his, definitely watch this drama, you'll love the scope he's given and what he does with it, he's absolutely mesmerising to watch and plays his character perfectly. I've never seen Shim Chang Min in anything before. He played his character believably and put in good work, he was likable when he should be likeable and horrible when he should be horrible. I cared about him too. Kim So Eun. I'm adding her to the list of women capable of playing good strong accomplished characters. She was exceptional and so was Jang Hee Jin who i really didn't like in the beginning but by the end I really wanted her to be happy and I was proud of her and her hard work. Lee Yu Bi is solid as Jo Yang Seon. There's nothing too special about her. At first I thought she was a bit too much like Park Shin Hye in You're Beautiful, but then she settled into her character and I really cared about her by the end. Now, Lee Joon Gi. Sigh. He's either over-acting (screaming, crying and writhing) or not acting at all (staring). The only reason I cared about him at all is because I wanted Jo Yang Seon to be happy. I'm pretty sure the king says as much at some point. I'm SO GLAD HE WENT TO THE MILITARY INSTEAD OF PLAYING CHOI YOUNG IN FAITH. I felt like he was trying to mimic that character and the way Lee Min Ho played it instead of making Kim Sung Yeol his own, and it's sad, because we all know he can act. Overall, there was so much potential here and one of the best bad guys ever and it's such a shame that it wasn't enough to make this drama good enough. As for the ending...sigh - without giving anything away, there's just no excuses for that kind of mediocrity. no excuses at all. Cut the guff from the middle and use that time to make a proper end. The music was all over the place. Too loud, too mediocre, used inappropriately. I found it annoying when it should have been contributing to my feelings towards characters and plot points. While I don't regret watching this drama, I won't ever re-watch it. I'll recommend this drama for people who are fans of any of the actors except Lee Joon Gi. Otherwise, just skip it and spend your time on something better.