Jung Hee-tae

as Deputy chief prosecutor (1 episode)

as Joo-kwon (8 episodes)

as Woo-kyeong (1 episode)

as Kim Jin-han (11 episodes)

as Cheol-seung

as Song Ji-cheol (12 episodes)

as Do Bae-myeong (12 episodes)

as Security Guard

as Department Manager

as [I Jun's uncle]

as Lee Hang-jae (15 episodes)

as Cheolwoon

as Director

as Kim Kyung-soo (adult) (2 episodes)

as Young-il (12 episodes)

as Assistant Han

as Joo Sang Cheol (1 episode)

as Policeman

as Seo Yun's father (1 episode)

as Dong-cheol

as Team Leader Seo (16 episodes)

as Director Jeong

as An Bong-Seob (16 episodes)