Park Hae-soo

Kim Je-hyeok

Jung Kyung-ho

Lee Jun-ho

Krystal Jung

Ji-ho

Lee Kyoo-hyung

Looney

Choi Moo-seong

Min-cheol

Jeong Min-sung

Dr. Ko

Park Ho-san

KAIST

Kang Seung-yoon

Jean Valjean

Jung Woong-in

Lieutenant Paeng

Jung Hae-in

Captain Yoo

Kim Sung-cheol

Jailbird

Im Hwa-young

Kim Je-hee

Kang Ki-doong

Officer Song

Choi Seong-won

Mole Boy

Sung Dong-il

Chief Jo

Kim Kyung-nam

Lee Joon-dol

Jung Moon-sung

Captain Yoo's Brother

Ju Seok-tae

Wood workshop manager Yum

Shin Won-ho

Corporal Joo [Jung Woo's soldier]

Ahn Sang-woo

Kim Yong Chul [Prison Warden]

Lee Young-suk

"Lifer" [Inmate - Woodwork shop]

Han Ji-won

Kim Je-hee (Young)