Young-woo (played by Kang Ye-won) is a protagonist in Watching.
Jun-ho (played by Lee Hak-ju) appears in Watching.
Director Choi (played by Ju Seok-tae) appears in Watching.
Officer Min (played by Min Kyung-jin) appears in Watching.
Min-hee (played by Lim Se-joo) appears in Watching.
Police (played by Lee Eun-hee) appears in Watching.
Mi Sook (played by Kim No-jin) appears in Watching.
