Watcher (Korean: 왓쳐; 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.

[1] 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.

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