Lee Jong Suk of "I Hear Your Voice" and Park Hae Jin, currently appearing in "You Who Came From The Stars," have signed up to play roles in the upcoming series "Doctor Stranger."

Lee Jong Suk will play a genius North Korean doctor who is treated unfairly when he works at a top medical institution in South Korea.

Sounds good. But despite the star cast, being set in a hospital is not always the prescription for k-drama success. Last year, two medical dramas scored very differently in the ratings.

To read the article, visit kdramastars.com.