• 
  Jae-Ho Heo

   Noh Ki-yong (2017) (unknown episodes)
• 
  Kap-su Kim

   Choi Il-hwan (17 episodes, 2017)
• 
  Shin-il Kang

   Shin Chang-ho (10 episodes, 2017)
• 
  Bo-young Lee

   Shin Young-joo (17 episodes, 2017)
• 
  Se-in Kwon

   Kang Jung-il (16 episodes, 2017)
• 
  Sang-Yoon Lee

   Lee Dong-joon (17 episodes, 2017)
• 
  Se-young Park

   Choi Soo-yeon (17 episodes, 2017)
• 
  Gook-hwan Jeon

  Jang Hyun-guk (Chief Justice of Supreme Court)

• 
  Hyung-Mook Kim

  Song Tae-gon
• 
  Eum Moon Suk

  Baek Sang Goo's subordinate
• 
  Hae-suk Kim

  Kim Sook-hee (2017)
• 
  Hyun Jin Lee

  Park Hyun-soo (2017)
• 
  Dal-hwan Jo

  Jo Kyung-ho (2017)
• 
  Yee-Yeon Jung

  Jo Yeon-hwa (2017)
• 
  Chang-hwan Kim

  Lee Ho-bum (2017)

• 
  Hong-Fa Kim

  Kang Yoo-taek (2017)
• 
  Roe-ha Kim

  Baek Sang-goo (2017)
• 
  Hie-kyung Moon

  Yoon Jung-ok (2017)