Trigger

Park Yoon-ho

Park Gyu-jin

10 eps

Kim Nam-gil

Lee Do

10 eps

Kim Young-kwang

Moon Baek

10 eps

Moon Seong-hyun

Teenage Moon Baek

10 eps

Park Hoon

Koo Jeong-man

10 eps

Kil Hae-yeon

Oh Gyeong-suk

10 eps

Kim Won-hae

Cho Hyeon-sik

10 eps

Woo Ji-hyun

Yoo Jeong-tae

10 eps

Jung Woong-in

Yoon Won-cheol

10 eps

Cho Han-cheul

Captain Joo

10 eps

Ahn Se-ho

Kim Deok-hyeon

10 eps

Cha Rae-hyung

Seo Hyeong-ju

10 eps

Jang Dong-ju

Jang Jeong-woo

10 eps

Son Bo-seung

Seo Young-dong

10 eps

Hong Min-gi

Kang Seong-jun

10 eps

Kim Joong-hee

Reporter Wang

10 eps

Park Kwang-jae

Yong-gu

10 eps

Sun Woo-sun

[Psychiatrist]

2 eps

Kang Chae-young

Park So-hyeon [Nurse]

4 eps

Kong Hyun-ji

Cho Se-yeong [Hyeon-sik's Daughter]

3 eps

Do Eun-bi

Ko Ji-yeong [Water Purifier Coordinator]

1 eps

Lee Suk

Jeo Won-sung [Sex Offender]

3 eps

Kim Dae-gon

Cho Woo-tae [Jeong-man's Subordinate]

2 eps

Shin Mun-sung

Hwang Suk-min [Inspector]

3 eps

Jeon Su-ji

[Situation Room Chief]

2 eps

Song You-hyun

[Teacher]

1 eps

Choi Jeong-in

[Gyu-jin's Mother]

2 eps

Gu Hyun

Lee Do (child)

2 eps

Han Sa-myeong

[Internal affairs investigator]

1 eps

Lee Ji-hoon

Computer Repair Shop Owner

3 eps

Kim Yoon-jin

Anti-gun Supporter (eps 10)

1 eps

Han Se-hee

Gun Supporter

1 eps