as Yoon Hak-young
as Ryu Gwang-pil
2026
as Lee Tae-yong
2015
as Yoon Hak-young
2023
as Ma Do-Nam
2018
as Kwi Kyung Kong
2016
as Director of Planning
2014
as Park Jong Su
2022
as Song Young-sik
2025
as Choi Il-Joong
2014
as Yoon Se-hoon
2025
as Pil-Mok
2013
as Oh Sang-hoon
2019
2023
as Detective Chief
2024
as Choi Yong-nam
2024
2023
as Jeong Kyung-han
2022
as Han Je Moon
2022
as Baek Yeong-cheol
2021
as Janitor
2021
2021
as Gui-nam
2020
as Detective Squad Chief Choi
2019
as Lawyer
2017
as CEO Han Gwang-Chul
2016
as Big sister Wang
2016
as Kim Ui-su
2012
as Yoon Hak-young
16 ep.
as Ryu Gwang-pil
1 episodes
as Lee Tae-yong
2 episodes
as Yoon Hak-young
16 episodes
as Ma Do-Nam
64 episodes
as Kwi Kyung Kong
20 episodes
as Director of Planning
3 episodes
as Park Jong Su
6 episodes
as Song Young-sik
1 episodes
as Choi Il-Joong
16 episodes
as Yoon Se-hoon
8 episodes
as Pil-Mok
24 episodes
as Oh Sang-hoon
1 episodes
as Police University Professor
32 episodes
as Ma Seok-koo
16 episodes
as Tak Young-Jin
20 episodes
1 episodes
as Nam Sang-Koo
17 episodes
as Kim Min-jung
12 episodes
as Nam Jong-Gyu
20 episodes
as Jo Hyeong-Chul
20 episodes
as CEO Min Sang-ho
16 episodes
as Jang Cheol-Min
32 episodes
as Min Yi-Bok
40 episodes
as Kwak Moon Heum
16 episodes
