Elder Yoon

Man next door

In-sool

Detective #1

Jung-in

Oh Jae-pyeong

Gak-su

Na Bok-cheon

Do Ji-yeol

Sin

Eui-sik

Han Seo-pil

Journalist (cameo) (uncredited)

Prosecutor

Byung-man

Hwang Myung-joon

Self

Dae-kyung

Kang Dae-woong

Jang Seong-pil

Director Ko

Oh Jae-pyeong

Pomade

Han Seo-pil

Dal-goo

Byeong-soo

Han Sang-jil

Park Dong-ho

Principle Deok-saeng

So Yang-ho

Chief Detective Ma

Nak-man's Father

Master Sergeant Min Dong-phil

Andrew

Professor Kim Sang-chul / Professor Oh Byung-seok

Dal-su

Han Seo-pil

Gwang-rok

Choi Sang-cheol

Old Man Ma

Father (voice)

Yeong-doo

Factory President

Oh Yeong-dal

Mr. Park

Gang-mok

Taxi Driver

Hyun-soo

Jung-ju's Father

Shin Duk-cheon

Nam Gyun-soo

Na Sang-Choon

Hak-Yi

The Monster (voice)

Oh Ge-un

Hwang

Mr. Chang

Myeong-goo

Yong-dae

Glutinous Rice Cake Seller

Mr. Ahn

Park Cheol-woong

Police Station Chief (seg. 6)

Police Box (Chief)