Trigger

Kim Jo-yeon (PD), Sun Woo-sun ([Psychiatrist]), Lee Eun (Elevator Woman), Kang Chae-young (Park So-hyeon [Nurse]), Kong Hyun-ji (Cho Se-yeong [Hyeon-sik's Daughter]), Do Eun-bi (Ko Ji-yeong [Water Purifier Coordinator]), Kim Geon-ho (Yongpyeong Detective), Lee Suk (Jeo Won-sung [Sex Offender]), Jeong A-mi (Pastor Kim Wife), Lee Seung-hun (Pastor Kim), Hong Boo-hyang (Kim Jeong-nam Mom), Jung Chae-won (Jo Min-geun Mom)

Lee Suk (Jeo Won-sung [Sex Offender]), Kim Yeon-woo (Police Office), Kim Dae-gon (Cho Woo-tae [Jeong-man's Subordinate]), Park Se-jun (Police Office), Gu Hyun (Lee Do (child)), Moon Woo-jin (Son Jun-yeong), Yeo Moo-yeong (Yoon Nam-gi), Kim Jin-ok (Onlooker), Lee Jung-yeol (Drunk Man), Park Eun-young (Drunk Man Wife)

Lee Suk (Jeo Won-sung [Sex Offender]), Kim Dae-gon (Cho Woo-tae [Jeong-man's Subordinate]), Shin Mun-sung (Hwang Suk-min [Inspector]), Kim Bum-suk (Detective), Jeon Su-ji ([Situation Room Chief]), Moon Woo-jin (Son Jun-yeong), Yeo Moo-yeong (Yoon Nam-gi), Jung Chae-won (Jo Min-geun Mom), Lee Eun-ju (Son Jun-yeong Mom), Bae Bo-ram (Nurse), Jeon Jun-woo (Lawyer Park), Shin Soo-Hyun (Neighbor)

Han Sa-myeong ([Internal affairs investigator]), Shin Se-hwi (Lee Yu-mi), Jung Yoo-mi (Lee Yu-mi Mom), Kang Jeong-im (Lawyer Choi), Lee Sang-hong (Lee Cheol-gyu), Choi Young-min (CCTV Installer)

Kong Hyun-ji (Cho Se-yeong [Hyeon-sik's Daughter]), Kim Seong-yong (Graphologist), Lee Da-yeong (Park Sun-jeong), Song Ok-suk (Heo Geum-ran), Baek Seung-chul (No Cheung-dae), Min Kyeong-ok (Minister Wife), Kim Eun-kyung (Bus Driver Wife), Im Ji-min (Ceo Secretary), Park Sin-un (Choi Young-jun), Lee Dong-soo (Lee Hyung-suk), Yoon Dan-bi (Nurse), Jang Yoon-woo (Doctor)

Song You-hyun ([Teacher]), Choi Jeong-in ([Gyu-jin's Mother]), Na Ho-won (Taxi Driver), Park Sin-un (Choi Young-jun), Lee Dong-soo (Lee Hyung-suk), Lee Tae-kyung (Nam Ga-yeon), Lee Hae-Woo (Choi Ho-seong), Jung Hae-kyun (Choi-geon), Lee Si-hoo (Lee Mu-o), Kwon Eun-soo (Kim Bo-mi), Yoon Byul-ha (Hong Je-in), Yoo Ji-hyuk (Dr. An Myeong-seok)

Jeon Su-ji ([Situation Room Chief]), Choi Jeong-in ([Gyu-jin's Mother]), Lee Tae-kyung (Nam Ga-yeon), Lee Hae-Woo (Choi Heo-seong), Jung Hae-kyun (Choi-geon), Lee Si-hoo (Lee Mu-o), Kwon Eun-soo (Kim Bo-mi), Yoon Byul-ha (Hong Je-in), Yoo Ji-hyuk (Dr. An Myeong-seok), Park Myung-shin (Shaman), Hwang Geon (Dr. Choi), Kim Min-seok (Doctor)

Kang Chae-young (Park So-hyeon [Nurse]), Kong Hyun-ji (Cho Se-yeong [Hyeon-sik's Daughter]), Lee Ji-hoon (Computer Repair Shop Owner), Rie Akiba (Haru), Kim Do-shin (Jong-sik)

Sun Woo-sun ([Psychiatrist]), Kang Chae-young (Park So-hyeon [Nurse]), Shin Mun-sung (Hwang Suk-min [Inspector]), Kim Nak-kyun (Kim Gye-nam), Gu Hyun (Lee Do (child)), Lee Ji-hoon (Computer Repair Shop Owner), Rie Akiba (Haru), Kim Dae-gon (Han-jeong), Son Kang-gook (Kim Yong-gyun), Kim Won-suk (Forensics Expert)

Kang Chae-young (Park So-hyeon [Nurse]), Park Jeong-min (Programming Director), Shin Mun-sung (Hwang Suk-min [Inspector]), Kang Gu-ha (Detective), Park Ji-han (Detective), Lee Ji-hoon (Computer Repair Shop Owner), Kim Yoon-jin (Anti-gun Supporter (eps 10)), Han Se-hee (Gun Supporter), Kang Jeon-yeong (Doctor)

Yoo Yong (Wi Jong-u), Kim Nak-kyun (Kim Gye-nam), Kim Dae-gon (Han-jeong), Son Kang-gook (Kim Yong-gyun), Kim Sung-ho (Choi Jin-man Aide), Song Won-su (Senior Citizen), Ji Seong-geun (Ice Rink Worker)

Yoo Yong (Wi Jong-u), Kim Sung-ho (Choi Jin-man Aide)