Believer

Cho Jin-woong

As Won-ho

Ryu Jun-yeol

As Seo Young-rak

Kim Joo-hyuk

As Jin Ha-rim

Cha Seung-won

As Brian

Kim Sung-ryung

As Oh Yeon-ok

Park Hae-joon

As Park Seon-chang

Nam Moon-chul

As Department Head

Seo Hyun-woo

As Jeong-il

Kang Seung-hyun

As So-yeon

Jung Jun-won

As Deok-cheon

Jung Ga-ram

As Dong-woo

Jin Seo-yeon

As Bo-ryeong

Kim Dong-young

As Dong-yeong

Lee Zoo-young

As Joo-yeong

Keum Sae-rok

As Soo-jeong

Park Seong-yeon

As Sign Language Interpreter

Lee Ye-eun

As Black Muffler

Lee Ji-min

As Cart

Park Eun-young

As Yook Pil-soon

Kim Tae-jun

As Young-bae

Na Ki-soo

As Lee Hak-seung

Jang Tae-min

As Veterinarian

Park Hyun-ji

As ER Doctor

Yoon Jae-in

As Anchor

Geum Gwang-san

As Ha-rim's Man

Baek Seung-hwan

As Incheon Factory

Han Sang-cheul

As Young-rak's Father

Cha Soon-hyeong

As Brian's Entourage

Ahn Seong-bong

As Brian's Entourage

Hwang Ki-seok

As Paramedic

Kim Ha-young

As Police

Kwon Hyuk-sung

As Incheon Factory Executive

Yoo Tae-seon

As SWAT