Nurse Koh Chang Suk's real identity was uncovered.

October 1, the 18th episode of the KBS drama "Good Doctor" featured the real identity of Nurse Jo Jung Mi (Go Chang Suk) being revealed. He has always been protecting the patients at Sung Won University Hospital from violence.

A number of mafia members come to visit Jo Jung Mi and Nam Joo Yeon (Jin Kyung) secretly watches them in silence. The mafia members threaten Jo Jung Mi to come back with them and revealing his past as an ex-mafia member. Jo Jung Mi replies, "You guys, clean up your lives and live like real men" and advised his previous partners in crime.

On the other hand, Executive Chief Jung (Kim Chang Wan) has been secretly planning to get rid of Yeo Won and Yoo Chae Kyung (Kim Min Seo) by pretending to entrust president Lee's position to Lee Hyuk Pil (Lee Ki Yeol), an ex-manager of the Sung Won University Hospital who has been kicked out by Lee Yeo Won (Na Young Hee).