The veteran detective Seo Do-cheol and his team at Major Crimes, relentless in their pursuit of criminals, join forces with rookie cop Park Sun-woo to track down a serial killer who has plunged the nation into turmoil.
Seo Do-cheol
Hwang Jung-min
Park Sun-woo
Jung Hae-in
Oh Jae-pyeong
Oh Dal-su
Wang Dong-hyun
Oh Dae-hwan
Bong Yoon-ju
Jang Yoon-ju
Yoon Shi-young
Kim Si-hoo
Lee Joo-yeon
Jin Kyung
Park Seung-hwan
Shin Seung-hwan
Jeon Seok-woo
Jeong Man-sik
Choi Wan-ki
Kwon Hae-hyo
Seo Woo-jin
Byun Hong-jun
Tue
Tue Minh
Min Kang-hoon
Ahn Bo-hyun
Kang Hang-jo
Huh Joon-ho
Ddeokchil
Hyun Bong-sik
Madam
Kim Jae-hwa
Gambling Group
Park Jun-myun
Gambling Group
Park Kyung-hye
Gambling Group
Joo Bo-bi
Former Team Leader
Kim Won-hae
School Principal
Park Myung-shin
Dean of Students
Ahn Sang-tae
Chi-hoon's Mother
Woo Jeong-won
Chi-hoon's Father
Jo Kwan-woo
MC Wrecka
Kim Min-su
Fake Haechi
Seo Young-joo
Detective
Heo Nam-jun
Police
Nam Jin-bok
Shin Chi-hoon
Yun Jun-yeol
Fire Fist TV
Hwang In-mu
Reporter
Kim Han-sol