Question: What is the name of the South Korean actor who is well known for his role in the 2016 South Korean television series W and starred alongside Han Hyo-joo?
Sentence (from "Spring Waltz"): It aired on KBS2 from March 6 to May 16, 2006 on Mondays and Tuesdays at 21:55 for 20 episodes.
Relevant evidence: No