Dark Hole

Director

• 
  Kim Bong Joo

Screenwriter

• 
  Jung Yi Do

Main Role

• 
  Kim Ok Bin

  Lee Hwa Sun

  Main Role
• 
  Lee Jun Hyuk

  Yoo Tae Han

  Main Role

Support Role

• 
  Park Keun Rok

  Choi Seung Tae

  Support Role
• 
  Oh Yu Jin

  Han Dong Rim [Student]

  Support Role
• 
  Song Sang Eun

  Kim Seon Nyeo / "Sunnyeo" / "Madame Kim"

  Support Role
• 
  Lee Ye Bit

  Jung Do Yoon

  Support Role
• 
  Bae Jung Hwa

  Han Ji Soo [Doctor]

  Support Role
• 
  Im Won Hee

  Park Sun Il [Police officer]

  Support Role
• 
  Cho Ji An

  Cho Hyun Ho [Policeman]

  Support Role
• 
  Kim Su Ol

  Yoon Ji Ae [Hyun Ho's wife]

  Support Role
• 
  Yong Jin

  "Snake Eyes" [Loan shark]

  Support Role
• 
  Kim Do Hoon

  Lee Jin Seok [Student]

  Support Role
• 
  Lee Ha Eun

  Yoon Saet Byul [Nurse]

  Support Role
• 
  Kim Byung Gi

  Choi Kyung Soo [Seung Tae's father / Muji High School's president]

  Support Role
• 
  Heo Hyung Kyu

  Kang Sung Beom [Hwa Sun's husband]

  Support Role
• 
  Jang Myung Gap

  Son Dong Goo [Teacher]

  Support Role
• 
  Jang Sung Won

  Lee Young Tae [Hospital Security Officer]

  Support Role
• 
  Park Gye Yoon

  Tae Ho [Student]

  Support Role
• 
  Ga Soo Min

  Han Yeul

  Support Role

Guest Role

• 
  Kim Han Jong

  Nam Young Shik [Tae Han's friend] (Ep. 1-2)

  Guest Role
• 
  Ahn Eun Jin

  So Jeong Hwa [Detective] (Ep. 1-2)

  Guest Role
• 
  Min Joon Hyun

  Detective Cha [Metropolitan Investigation Unit] (Ep. 1)

  Guest Role
• 
  Won Chun Gyu

  Nam Jin Il [Infected man] (Ep. 1-2)

  Guest Role
• 
  Yoon Seul

  Kim Bo Eun [Jung Do Yoon's mother / Nurse] (Ep. 1-2)

  Guest Role
• 
  Oh Jin Seok

  [Shaman rite dummer] (Ep. 1)

  Guest Role
• 
  Yang Jin Seon

  [Shaman rite attendee] (Ep. 1)

  Guest Role
• 
  Jung Eui Soon

  [Shaman rite attendee] (Ep. 1)

  Guest Role
• 
  Kim Deok Ju

  [Shaman house woman] (Ep. 1)

  Guest Role
• 
  Lee Sang Hee

  [Jin Il's wife] (Ep. 1-2)

  Guest Role
• 
  Seo Young Sam

  Seo Yong Min [school janitor] (Ep. 2-6)

  Guest Role
• 
  Jung Hae Kyun

  Lim Joo Ho (Ep. 2-3)

  Guest Role
• 
  Yoon Jung Hoon

  Woo Sang [Student / Jin Seok's friend] (Ep. 2)

  Guest Role
• 
  Ho Sol Hee

  [Female student / Bully] (Ep. 2, 8)

  Guest Role
• 
  Chung Su Bin

  [Female student / Bully] (Ep. 2, 8)

  Guest Role
• 
  Jung Se Hyun

  [Female student / Bully] (Ep. 2, 8)

  Guest Role
• 
  Uhm Tae Ok

  [Line worker] (Ep. 2)

  Guest Role
• 
  Gi Hwan

  [Pathologist] (Ep. 2)

  Guest Role
• 
  Shin Jun Chul

  [Pathologist] (Ep. 2)

  Guest Role
• 
  Tak Jae Hoon

  Mr. Bae [infected man] (Ep. 2)

  Guest Role
• 
  Park Xi Yeon

  [High school student] (Ep. 3-4, 6)

  Guest Role
• 
  Jeon Yeo Jin

  Kim Ji Min [Lim Joo Ho's disciple] (Ep. 3)

  Guest Role
• 
  Im Ho Joon

  Nam Dong Geun [Hospital survivor] (Ep. 4-10)

  Guest Role
• 
  Kim Won Seok

  Mr. Kim [Hospital survivor] (Ep. 4-10)

  Guest Role
• 
  Lee Hyun Kyun

  Noh Jin Soo [wanted man] (Ep. 3-7)

  Guest Role
• 
  You Chae Eun

  [Nurse] (Ep. 3-5)

  Guest Role
• 
  Lee So Geum

  [Patient] (Ep. 4-5)

  Guest Role
• 
  Lee Chul Min

  Kang Duk Soo (Ep. 4, 6)

  Guest Role
• 
  Choi Min Geum

  [Chang Hee's grandmother] (Ep. 4, 6)

  Guest Role
• 
  Yoo Sang Hoon

  [Agent] (Ep. 5-6)

  Guest Role
• 
  Park Ji An

  Jang Myung Cheol [school survivor]

  Guest Role
• 
  Kim Kang Min

  Min Gyu (Ep. 11-12)

  Guest Role
• 
  Kim Yoon Ji

  An Ji Sook

  Guest Role
• 
  Jeon Young Mi

  [Bong Ju's mother]

  Guest Role
• 
  Lee Moo Nyoung

  [Hospital survivor]

  Guest Role
• 
  Kim Mi Ra

  [Middle-aged woman #2]

  Guest Role
• 
  Kang Seo Ha

  [Disorderly student #3]

  Guest Role
• 
  Yoon Jong Won

  [Hospital survivor]

  Guest Role
• 
  Chu Eun Kyung

  [Bong Sik's wife]

  Guest Role
• 
  Lee Ho Won

  Hyun Bong Shik

  Guest Role
• 
  No Eun Jeong

  [Hospital survivor]

  Guest Role
• 
  Han Yu Hee

  [Locked out patient] (Ep. 5)

  Guest Role
• 
  Park Ye Chan

  Chang Hee

  Guest Role
• 
  Gu Yun Hoi

  [Doctor] (Ep. 4)

  Guest Role
• 
  Bae An Na

  [Nurse] (Ep. 4)

  Guest Role
• 
  Choi Hwa Young

  [Employee] (Ep. 12)

  Guest Role
• 
  So Yun Ho

  [Jingan Supermart survivor] (Ep. 9)

  Guest Role
• 
  Lee Dong Wook

  [Hospital survivor]

  Guest Role
• 
  Choi Joon Kyu

  Yoo Kang Soo (Ep. 4, 10)

  Guest Role
• 
  Kim Won Joong

  [Hyun Mi's father] (Ep. 3)

  Guest Role
• 
  Jang Soon Mi

  [Hospital survivor]

  Guest Role
• 
  Sung Hyun Mi

  [Hyun Ji's mother] (Ep. 8)

  Guest Role
• 
  Jang Yong Bok

  [Doctor] (Ep. 9)

  Guest Role
• 
  Han Dong Won

  [Snake Eyes' co-worker] (Ep. 10)

  Guest Role
• 
  Ok Joo Ri

  [Convenience store owner] (Ep. 12)

  Guest Role
• 
  Kim Kwang Suk

  [Detective] (Ep. 1, 8)

  Guest Role
• 
  Park Yoo Hyun Guest Role
• 
  Jung Yeun

  [Baseball cap wearer]

  Guest Role
• 
  Na Se Na

  [Teacher]

  Guest Role

Bit part

• 
  Lee Jae Sung

  [Hospital survivor]

  Bit part

Unknown

• 
  Lee Chae Hyun Unknown