Song Kang-ho
Park Gang-du

Byun Hee-bong
Park Hie-bong

Park Hae-il
Park Nam-il

Bae Doona
Park Nam-joo

Ko A-sung
Park Hyun-seo

Oh Dal-su
The Monster (voice)

Lee Jae-eung
Se-jin

Yoon Je-moon
Homeless Man

Yim Pil-sung
Fat Guevara

Kim Roi-ha
Yellow Suit at Funeral

Koh Soo-hee
Hostage nurse

Kim Hak-seon
Civilian Military Kim

Scott Wilson
Douglas

Paul Lazar
American Doctor

David Anselmo
Donald

Baek Do-bin
Fumigation Truck Skinny Man

Choi Dae-sung
Man from Duck Boat (uncredited)

Choi Jae-sup
Detective Agency Subordinate 1 (uncredited)

Jung Seo-yoon
Woman with Long Hair (uncredited)

Philip Hersh
Additional Voices (voice) (uncredited)

Jeong In-gi
Isolation Ward Doctor (uncredited)

Jeong Kang-hee
Mr. Yoon's Employee (uncredited)

Kim Bi-bi
Isolation Ward Nurse 1 (uncredited)

Kim Choo-wol
Woman crying (uncredited)

Kim Jin-seon
Woman from Couple (uncredited)

Kim Nan-hee
Woman from Duck Boat (uncredited)

Kwon Byung-gil
Doctor from Isolation Ward 1 (uncredited)

Kwon Hyeok-pung
Fisherman 1 (uncredited)

Lee Dong-yong
4th Mat 2 (uncredited)

Lee Jong-yoon
4th Mat 1 (uncredited)

Min Kyung-jin
Altar Security (uncredited)

Park Jeong-gi
Fumigation Truck Dyed-hir Man (uncredited)

Park No-shik
Inquiry Officer

Ra Mi-ran
Woman Stomping Her Feet (uncredited)

Shin Hyeon-jong
Mr. Yoon's Friend (uncredited)

Son Young-soon
Grandmother from Bus (uncredited)

Son Jin-ho
Doctor from Isolation Ward 2

Yoo Seung-mok
Taxi Driver

Yoo Yeon-soo
District officer Mr. Jo (uncredited)

Seo Young-ju
Protester

Ko Chang-seok
Nurse

Park Jin-woo
Isolation Ward Constable (uncredited)

Park Ji-hwan