I, the Executioner

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.

• 
  Ryoo Seung-wan
• 
  Lee Seok-sool

• 
  Hwang Jung-min
  Seo Do-cheol
• 
  Jung Hae-in
  Park Sun-woo
• 
  Oh Dal-su
  Oh Jae-pyeong
• 
  Oh Dae-hwan
  Wang Dong-hyun
• 
  Jang Yoon-ju
  Bong Yoon-ju
• 
  Kim Si-hoo
  Yoon Shi-young
• 
  Jin Kyung
  Lee Joo-yeon
• 
  Shin Seung-hwan
  Park Seung-hwan
• 
  Jeong Man-sik
  Jeon Seok-woo
• 
  Kwon Hae-hyo
  Choi Wan-ki
• 
  Byun Hong-jun
  Seo Woo-jin
• 
  Tue Minh
  Tue
• 
  Ahn Bo-hyun
  Min Kang-hoon
• 
  Huh Joon-ho
  Kang Hang-jo
• 
  Hyun Bong-sik
  Ddeokchil
• 
  Kim Jae-hwa
  Madam
• 
  Park Jun-myun
  Gambling Group
• 
  Park Kyung-hye
  Gambling Group
• 
  Joo Bo-bi
  Gambling Group
• 
  Kim Won-hae
  Former Team Leader