Cast
Jeong Woong-in
as Lieutenant Paeng
Gi Doong Kang
as Prison Officer Song
Kim Kyung-nam
Dong-il Sung
as Prison Officer Jo
Kim Han-Jong
as Daehyungsoji
Park Ho-San
as KAIST
Jae-Sung Jung
as Professor Myung
Kyu-Sung Lee
as Jung-Soo
Jung Kyung-ho
as Lee Joon Ho
Jang Hyuk-jin
as Han Yang's father
Park Hae-soo
as Kim Je Hyuk
Kong Sang-Ah
as Kim Ji-Ho's Mother
Sin Jae-ha
as Kim Min Sung
Seo Ji-Hoon
as Ji Ho's friend
Lee Kyoo-hyung
as Yoo Han Yang 'Loony'
Moon-Sung Jung
as Yoo Jeong Min
Soo-jung Ye
as Je Hyuk's mother
Jang Hae-Song
as Han Yang's alumnus
Shin Jae-ha
Ahn Sang-Woo
as Prison Warden Kim Yong Chul
Min-sung Jung
as Dr. Go
Yoo Jae-myung
as Je Hyuk's Lawyer
Kim Sung-cheol
as Beobja
Ahn Chang-hwan
as Crony
Hwa-Young Im
as Kim Je Hee
Sung-won Choi
as Jeombaki
Park Ho-san
Jeong Ung-in
Krystal Jung
as Kim Ji Ho
Kim Kyung-Nam
as Lee Joon Dol
Moo-Seong Choi
as Kim Min Chul
Seung-Yoon Kang
as Jang Bal Jang
Jun-han Kim
as Song Ji Won
Yeom Hye-ran
as Han Yang's mother
Park Hyoung-soo
as Chief Na Hyung Soo
Sin Dong-ryeok
as Reporter
Lim Hwa-young
Jung Hae-in
as Captain Yoo Jeong Woo
Lee Chae Yun
as Kim Ji Ho (young)
Joo Suk-tae
as Yeom Sang Jae
Lee Kyu-hyung
Kim Ki Nam
as Prison Officer Choi
Kang Seung-yoon
Won-Ho Shin
as Corporal Joo
