Watcher (TV series)

Watcher (stylized as WATCHER) is a 2019 South Korean television series starring Han Suk-kyu, Seo Kang-joon, and Kim Hyun-joo. It aired on OCN every Saturday and Sunday at 22:20 (KST) from July 6 to August 25, 2019.

Synopsis
A brutal murder committed 15 years ago turned three lives upside down. A decade and a half later, the trio – brought together by fate – goes on the hunt for answers.

Main

 * Han Suk-kyu as Do Chi-kwang
 * A detective who has caught many criminals during his career. He hates corruption within the police and becomes leader of the internal affairs investigation team to find the truth about a particular incident.


 * Seo Kang-joon as Kim Yeong-goon
 * Moon Woo-jin as young Kim Yeong-goon
 * A police officer who joins Do Chi-kwang's team after they become involved in the same incident.


 * Kim Hyun-joo as Han Tae-joo
 * A former prosecutor turned lawyer after she got involved too deep while working on a case and almost died. She starts working with Do Chi-kwang and Kim Yeong Goon.

Supporting

 * Heo Sung-tae as Jang Hae-ryong
 * Head of the Police Investigation Department, he is often in conflict with Do Chi-kwang.


 * Park Joo-hee as Jo Soo-yeon
 * With a degree in Chemistry, she became part of the Scientific Investigation Team. After she makes a mistake, however, she decides to quit to join the internal affairs investigation team.


 * Joo Jin-mo as Park Jin-woo
 * Deputy Commissioner of police force.


 * Kim Soo-jin as Yeom Dong-sook
 * Commissioner of police force.


 * Lee Joong-ok as Jae-shik's friend
 * Ahn Gil-kang as Kim Jae-myung, Kim Yeong-goon's father
 * Lee Jae-yoon as Kim Kang-wook
 * Jung Do-won as Hong Jae-sik
 * Kim Dae-gun as Detective Chan-hee
 * Won Gun-su as Detective 2
 * Park Hoon as Yoon Ji-hoon, Han Tae-joo's ex-husband
 * Jung Min-sung as Son Byeong-gil
 * Kim Dong-hyun as Kim Sang-joon
 * Chae Dong-hyun as Lee Dong-yoon
 * Yang Ye-na as Yoon-ji
 * Kim Yong-ji as Lee Hyo-jung
 * Park Sung-il as Department Head Kim
 * Han Sang-hoon as Coroner
 * Shin Hyun-jong as Min Young-ki
 * Jung Soon-won as Jung Han-wook
 * Yu Ha-jun as Oh Sang-do
 * Park Ji-hoon as Park Si-young
 * Lee Seung-chul as Chairman Jung Seok-tae
 * Shin Mun-sung as Lee Joong-ho (EP.10)
 * Lee Yoon-sun as Jang Ji-yoon (EP.14)

ADDITIONAL CAST
 * Woo Jung-won as Park Ji-hyun
 * Lee Nam-hee as Shin Woo-sung
 * Jeon Suk-chan as Kim Jo-han
 * Park Mi-hyun as Jo Hyun-kyung
 * Kim Dan-woo as Areum (Son Byeong-gil's daughter)
 * Lee Eol as Jang Hyun-soo
 * Yoo Jung-ho as Park Jung-geum
 * Kim Geon-u as Kim Cha-hoon
 * Kim Ju-yeon as Baek Song-yi
 * Han Seung-soo as Regional Investigation unit detective
 * Jang Eui-don as Patient
 * Yu Seung-il as Driving violator (ep.1)
 * Park Yong

Production
The series is directed by Ahn Gil-ho (Stranger, Memories of the Alhambra).