Jung Jae-young

as Heuk Su-gang

as Kim Yong-byeong

as Min Ki-hyun

as Chen Lin

as Dr. Jung Byeong-ho

as Choi Ban-seok (16 episodes)

as Jun-geol

as Baek Beom (64 episodes)

as Jang Deuk-cheon (16 episodes)

as Myungsoo

as Ha Jae-kwan

as Ham Chunsu

as Jin Sang-pil (20 episodes)

as Gap-su

as Lee Sang-hyeon

as Han Jung-seok

as Woo-seok

as Jaehak

as Det. Choi Hyung-goo

as Tae Gun-ho

as Kim Sang-nam

as Man in Taekwondo uniform

as Cheon Yong-deok

as Mr. Kim