Pemeran Sinkhole

Cha Seung Won

as Jung Man Soo

Pemeran Utama

Kim Sung Kyun (김성균)

as Park Dong Won

Pemeran Utama

Lee Kwang Soo

as Kim Seung Hyun

Pemeran Utama

Kim Hye Joon (김혜준)

as Hong Eun Ju

Pemeran Utama

Nam Da Reum (남다름)

as Jung Seung Tae [Man Su's son]

Pemeran Pembantu

Kwon So Hyun

as Yeong I [Dong Won's wife]

Pemeran Pembantu

Han Hye Rin

as An Hyo Jeong

Pemeran Pembantu

Kim Geon U

as Park Su Chan

Pemeran Pembantu

Na Chul

as Min Jun

Pemeran Pembantu

Oh Ja Hun

as Seong Hun

Pemeran Pembantu

Lee Hak Joo

as Deputy Jung

Pemeran Pembantu

Kim Hong Pa

as Department Head Seo

Pemeran Pembantu

Ko Chang Seok

as [Rescue captain]

Pemeran Pembantu

Kim Jae Hwa

as [Room 301 auntie]

Pemeran Pembantu

Jung Yun Ha

as [Young mother]

Pemeran Pembantu

Jung Young Sook

as [Grandmother]

Pemeran Pembantu

Park Ok Chool

as [Seong Hun's mother]

Pemeran Pembantu

Jang Gwang

as [Next-door grandfather]

Pemeran Pembantu

Jun Eun Mi

as [Grandmother O's daughter]

Pemeran Pembantu

Lee Ju Mi

as [Tae Bo fitness member]

Bintang Tamu

Lee Kun Goo

as [Rappel rescue worker]

Bintang Tamu

Jung Seo In

as [Landlady]

Bintang Tamu

Yeon Joon

as [Expert]

Bintang Tamu

Oh Jae Se

as [Helicopter co-pilot]

Bintang Tamu

Kim Wang Do

as [Helicopter co-pilot]

Bintang Tamu

Park Min Ji

as [Reporter]

Bintang Tamu

Jeong Yu Hyun

as [Rescue worker 2]

Bintang Tamu

Kim Tae Young

Art Director

Shin Tae Ho

Cinematography

Kim Ji Hoon

Sutradara

Shin Min Kyung

Editor

Jeon Cheol Hong

Screenwriter

Kim Jung Han

Screenwriter

Yoon Don Sun

as [Taxi driver]

Bit part