© 2026 The Couch Critic
Status
Returning Series
Release
2016 - Present
Seasons / Eps
2 / 17
Streaming availability by country
"There are those who are born monsters, but there are also those who are made into monsters by people."
Detectives from the present and a detective from the past communicate via walkie-talkie to solve a long-time unsolved case.
73 Cast Members
Lee Je-hoon
Park Hae-young
17 Episodes
Kim Hye-soo
Cha Soo-hyun
17 Episodes
Cho Jin-woong
Lee Jae-han
17 Episodes
Jang Hyun-sung
Kim Bum-joo
16 Episodes
Jung Hae-kyun
Ahn Chi-soo
16 Episodes
Kim Won-hae
Kim Gye-chul
16 Episodes
Jung Han-bi
Oh Yoon-seo
16 Episodes
Lee Yoo-jun
Jung Heon-gi
16 Episodes
Kim Min-gue
Hwang Ui-kyung
16 Episodes
Kang Chan-hee
Park Sun-woo
16 Episodes
Im Hwa-young
Cha Soo-min
16 Episodes
Son Hyun-joo
Jang Young-cheol
6 Episodes
Jeon Su-ji
Kang Hye-seung
6 Episodes
Shin Yi-Joon
Kang Hye-seung (Young)
6 Episodes
Seo Ji-hoon
Jang Tae-jin
6 Episodes
Kim Woo-seok
Lee Dong-jin
6 Episodes
Choi Woo-ri
Shin Yeo-jin
3 Episodes
Sung Hyun-mi
Jung Kyung-soon
3 Episodes
Kim Ki-cheon
Lee Chan-goo
3 Episodes
Lee Ki-seop
Lee Jin-hyung
3 Episodes
