Troubleshooter

Sul Kyung-gu

as

Kang Tae-sik

Lee Jung-jin

as

Jang Pil-ho

Oh Dal-su

as

Choi Sang-cheol

Ju Jin-mo

as

Won Joo-bong

Lee Sung-min

as

Yoon Dae-hee

Moon Jeong-hee

as

Oh Kyung-shin

Song Sae-byuk

as

Oh Jong-gyoo

Lee Young-hoon

as

Psycho

Park Young-seo

as

Goo Bon-chi

Jo Young-jin

as

Jo Hyeon-cheol

Kim Hyang-gi

as

Tae-sik's Daug...

Song Jae-ho

as

Oh Joong-ho

Kim Jung-pal

as

Chief Prosecut...

Min Young

as

Communications...

Ha Soo-ho

as

Hospital Secur...

Lee Jun-hyeok

as

DNA Team Agent