Through the Darkness (2022)

Composer

• 
  Gaemi

Director

• 
  Kim Jae Hong
• 
  Park Bo Ram

Screenwriter

• 
  Seol Yi Na
• 
  Kwon Il Yong

Main Role

• 
  Kim Nam Gil

  Song Ha Yeong

  Main Role
• 
  Jin Seon Kyu

  Kook Yeong Su

  Main Role
• 
  Kim So Jin

  Yun Tae Gu

  Main Role

Support Role

• 
  Ryeoun

  Jung U Ju [Crime Behavior Analysis Team member / Statistical analyst]

  Support Role
• 
  Lee Dae Yeon

  Baek Jun Sik

  Support Role
• 
  Kim Won Hae

  Heo Gil Pyo

  Support Role
• 
  Jung Soon Won

  Nam Il Yeong [Regional Investigation Unit Section 1 Team 1 member]

  Support Role
• 
  Ha Do Gwon

  Sin Gi Ho ["Fact Today" director]

  Support Role
• 
  Kong Seong Ha

  Choi Yun Ji ["Fact Today" reporter]

  Support Role
• 
  Lee Ha Nee

  Im Mu Sik [Reporter]

  Support Role
• 
  Kim Hye Ok

  Park Yeong Sin [Ha Yeong's mother]

  Support Role
• 
  Jo Young Jin

  Lee Jin Cheol [Commissioner general]

  Support Role
• 
  Hong Woo Jin

  O In Tak

  Support Role
• 
  Seo Dong Gab

  Kim Bong Sik

  Support Role

Guest Role

• 
  Shin Dong Eun

  [Reporter]

  Guest Role
• 
  Kim Yun Seul

  [Cotton candy girl] (Ep. 1)

  Guest Role
• 
  Kim Kwan Mo

  [Undercover cop in drag] (Ep. 1)

  Guest Role
• 
  Choi Da Young

  [Nurse] (Ep. 1)

  Guest Role
• 
  Hwang Jung Min

  ['Turtle' supermarket owner] (Ep. 1)

  Guest Role
• 
  Heo Seon Haeng

  [Medical examiner] (Ep. 1)

  Guest Role
• 
  Kim Deok Ju

  [Hwa Yeon's landlord] (Ep. 1)

  Guest Role
• 
  Lee Si Young

  [Neighborhood single mother] (Ep. 1)

  Guest Role
• 
  Bang Jung Hyun

  [Detective] (Ep. 1)

  Guest Role
• 
  Park Jin Young

  [Doctor] (Ep. 1)

  Guest Role
• 
  Yoon Hye Ri

  Choi Hwa Yeon [Murder victim] (Ep. 1-2)

  Guest Role
• 
  Oh Kyung Joo

  Bang Gi Hun [Hwa Yeon's boyfriend] (Ep. 1-2)

  Guest Role
• 
  Oh Hee Joon

  Kang Yu Min [Daebong Police Substation] (Ep. 1-2)

  Guest Role
• 
  Go Geon Han

  Yang Yong Cheol [Man claiming to be the "Red Cap Case" murderer] (Ep. 1-2)

  Guest Role
• 
  Oh Seung Hoon

  Jo Gang Mu [Serial killer] (Ep. 1-2)

  Guest Role
• 
  Lee Chun Moo

  Song Ha Yeong [Young] (Ep. 1, 11)

  Guest Role
• 
  Moon Dong Hyuk

  Moon Tae Su [Detective at Dongbu Police Station] (Ep. 1-2, 11)

  Guest Role
• 
  Kim Hyun

  [Hwa Yeon's mother] (Ep. 1-2, 11)

  Guest Role
• 
  Jung Man Shik

  Park Dae Ung [Detective at Dongbu Police Station] (Ep. 1-2, 11-12)

  Guest Role
• 
  Cheon Dong Been

  [Deliveryman] (Ep. 2)

  Guest Role
• 
  Noh Ha Yeon

  Lee Su Hyeon [Murder victim] (Ep. 2-3)

  Guest Role
• 
  Lee Gi Seob

  Kang Jin Gu (Ep. 3)

  Guest Role
• 
  Lee Jong Yoon

  Jang Deuk Hok (Ep. 3)

  Guest Role
• 
  Bae Sung Il

  [Detective] (Ep. 3)

  Guest Role
• 
  Jung Chung Gu

  [Film developer] (Ep. 3)

  Guest Role
• 
  Park Yoo Mil

  Lim Hyron Ju (Ep. 3)

  Guest Role
• 
  Lee Jae Eun

  Mrs. Kim [Motel owner] (Ep. 3)

  Guest Role
• 
  Ki Hwan

  [Su Hyeon's father] (Ep. 3-4)

  Guest Role
• 
  Lee Hun Joo

  [Su Hyeon's mother] (Ep. 3-4)

  Guest Role
• 
  Kwon Eun Sung

  Lee Ji Uk [Su Hyeon's brother] (Ep. 3-4)

  Guest Role
• 
  Son Young Sun

  Lee Chun Yeong [Elderly recycler] (Ep. 3-4)

  Guest Role
• 
  Woo Jung Kook

  Cho Hyeon Gil (Ep. 3-5)

  Guest Role
• 
  Jung Young Keum

  [Hyeon Gil's landlord] (Ep. 4)

  Guest Role
• 
  Choi Nam Wook

  [Convenience store owner] (Ep. 4)

  Guest Role
• 
  Han Joon Woo

  Koo Yeong Chun (Ep. 4-8)

  Guest Role
• 
  Goo Sung Hwan

  Hwang Dae Seon (Ep. 5)

  Guest Role
• 
  Seo Myung Chan

  Han Seok Hun [Professor] (Ep. 5)

  Guest Role
• 
  Hwang In Joon

  [Detective] (Ep. 5)

  Guest Role
• 
  Oh Kyu Taek

  [Man drinking with prosecutor] (Ep. 5)

  Guest Role
• 
  Seon Yool Woo

  [Detective] (Ep. 5-7, 9-10)

  Guest Role
• 
  Hong Ye Ji

  [Bookstore employee] (Ep. 6)

  Guest Role
• 
  Kim Joong Hee

  Nam Gi Tae [Killer] (Ep. 6-10)

  Guest Role
• 
  Lee Geun Hoo

  Kwak Man Hyeon (Ep. 7)

  Guest Role
• 
  Lee Jae Woo

  Detective Kim (Ep. 7)

  Guest Role
• 
  Kim Bum Joon

  [Witness] (Ep. 7)

  Guest Role
• 
  Yoo Yong

  [Detective] (Ep. 7)

  Guest Role
• 
  Lee Dong Kyu

  [Anchorman] (Ep. 7)

  Guest Role
• 
  Kim Kyung Min

  Professor An (Ep. 7, 9)

  Guest Role
• 
  Sung No Jin

  [Forensics examiner] (Ep. 7, 9)

  Guest Role
• 
  Kim Joo Ah

  [Columbarium employee] (Ep. 9)

  Guest Role
• 
  Choi Min Hyeok

  [Victim] (Ep. 9)

  Guest Role
• 
  Han Dae Gwan

  [Victim's father] (Ep. 9)

  Guest Role
• 
  Kim Hyun Tae

  [Witness] (Ep. 9)

  Guest Role
• 
  Jang Eun Seo

  [Woman walking home] (Ep. 9)

  Guest Role
• 
  Kim Nak Kyun

  [Detective] (Ep. 10)

  Guest Role
• 
  Choi Sol Hee

  Yang Ji Suk (Ep. 10-11)

  Guest Role
• 
  Na Chul

  Woo Ho Seong (Ep. 10-12)

  Guest Role
• 
  Hong Eun Jeong

  [Manyeon bus stop woman] (Ep. 11)

  Guest Role
• 
  Lee Ye Joo

  [Christmas Tree girl] (Ep. 11)

  Guest Role
• 
  Yoon Ga Yi

  Lee Cho Won [Geumchan Village woman] (Ep. 11)

  Guest Role
• 
  Noh Eun Ha

  [ATM woman] (Ep. 11)

  Guest Role
• 
  Bo Ra Na

  [Massage parlor owner] (Ep. 12)

  Guest Role
• 
  Kim Bong Soo

  [Ji Suk's father] (Ep. 12)

  Guest Role
• 
  Kim Bong Hee

  [Ji Suk's mother] (Ep. 12)

  Guest Role
• 
  Jun Jung Il

  [PR manager]

  Guest Role

Unknown

• 
  Yu Jae Hee Unknown
• 
  Jo Seung Gu Unknown
• 
  Kim Geun Young Unknown
• 
  Lee Yu Ju Unknown