This drama indeed has great actors (i recognize some from Moon that Embraces the Sun) but they are limited bc the script is in need of improvement. I've always loved Song Seung Hun so I was excited to see him in this. Kim Jaejoong as well. Since its still early, I'll keep watching. On comments on the repetitiveness of the story...the name of drama is about Time Slip Dr. Jin so it's a given there would be medical stuff to be done. I was just expecting more of Dr. Jin going back and forth in time. But the writers i think have a grasp on the consequences of influencing the past.