Abyss

Composer

• 
  Lim Ha Yong

Director

• 
  Yoo Je Won

Screenwriter

• 
  Moon Su Yeon

Main Role

• 
  Park Bo Young

  Go Se Yun | Lee Mi Do

  Main Role
• 
  Ahn Hyo Seop

  Cha Min

  Main Role

Support Role

• 
  Lee Sung Jae

  Oh Young Cheol [Surgeon]

  Support Role
• 
  Kwon Soo Hyun

  Seo Ji Wook / Oh Tae Jin [Prosecutor]

  Support Role
• 
  Lee Si Eon

  Park Dong Chul [Detective]

  Support Role
• 
  Han So Hee

  Jang Hee Jin / Oh Soo Jin [Cha Min's fiance]

  Support Role
• 
  Yun Yu Sun

  Eom Ae Ran [Cha Min's mother]

  Support Role
• 
  Lee Chul Min

  Park Gi Man [Park Mi Jin's father]

  Support Role
• 
  Ha Sung Kwang

  Go Chang Soo [Se Yeon's father]

  Support Role
• 
  Park Mi Hyun

  Kim Jung Hee [Se Yeon's mother]

  Support Role
• 
  Song Sang Eun

  Lee Mi Do [Park & Jang Law Firm, Dong Chul's girlfriend]

  Support Role
• 
  Lee Dae Yeon

  Seo Cheon Shik [Chief Judge]

  Support Role
• 
  Park Sung Yun

  Park Mi Soon [Cha Min's housekeeper]

  Support Role
• 
  Kim Sung Bum

  Detective Choe

  Support Role
• 
  Lee Ji Hyun

  Jang Sun Young [Hee Jin’s mother]

  Support Role
• 
  Lee Soo Min

  Go Se Yeon [Young]

  Support Role
• 
  Kang Ye Seo

  Jang Hee Jin [Young]

  Support Role
• 
  Han Ji Won

  Cha Min

  Support Role

Guest Role

• 
  Kim Sa Rang

  Go Se Yeon [Before death] (Ep. 1-2)

  Guest Role
• 
  Ahn Se Ha

  Cha Min [Before death] (Ep. 1-3)

  Guest Role
• 
  Seo In Guk

  [Grim reaper] (Ep. 1)

  Guest Role
• 
  Jung So Min

  [Grim reaper] (Ep. 1)

  Guest Role
• 
  Im Jae Geun

  [Funeral attendant] (Ep. 1)

  Guest Role
• 
  Kim Geon Ho

  [Ripped Cha Min's shirt in Lobby] (Ep. 1)

  Guest Role
• 
  Kwon Hyuk Soo

  [Chairman, faking illness] (Ep. 2)

  Guest Role
• 
  Jin Hyun Kwang

  [Chairman's aide] (Ep. 2)

  Guest Role
• 
  Lee Sang Hwa

  [Corner store owner] (Ep. 2)

  Guest Role
• 
  Oh Kyung Joo

  [Corner store clerk] (Ep. 2)

  Guest Role
• 
  Shim Hye Yun

  Jang Hee Jin [Young Oh Soo Jin] (Ep. 5)

  Guest Role
• 
  Park Seung Tae

  [Park Min Gyu's mother] (Ep. 7-10)

  Guest Role
• 
  Park Ye Young

  Nurse Kim (Ep. 7, 10, 12)

  Guest Role
• 
  Jun Eun Mi

  [Neighbor] (Ep. 8)

  Guest Role
• 
  Yeo Woon Bok

  [Se Yeon's doctor] (Ep. 8)

  Guest Role
• 
  Jo Wan Ki

  Choe Gi Hun [Attacker] (Ep. 8-9)

  Guest Role
• 
  Jung Ye Bin

  [Se Yeon's friend] (Ep. 9)

  Guest Role
• 
  Eom Ji Man

  [Prison guard] (Ep. 9)

  Guest Role
• 
  Bae Seong Il

  [Security manager reviews CCTV footage] (Ep. 11)

  Guest Role
• 
  Lee Seung Gi

  [Taxi driver] (Ep. 11)

  Guest Role
• 
  Jung Chung Gu

  [Mi Do’s father] (Ep. 11)

  Guest Role
• 
  Cha Mi Kyung

  [Mi Do’s mother] (Ep. 11)

  Guest Role
• 
  Lee Mi Do

  [Store customer] (Ep. 12)

  Guest Role
• 
  Jung Bo Min

  [Store customer] (Ep. 12)

  Guest Role
• 
  Park Ki Ryung

  [Police chief] (Ep. 12)

  Guest Role
• 
  Park Geon Rak

  Jung Ki Young [Hit and Run case Detective] (Ep. 12-13)

  Guest Role
• 
  Song Jae Ryong

  [Husband in hit and run scam] (Ep. 13)

  Guest Role
• 
  Yoo Chae Yeon

  [Kid] (Ep. 12-13)

  Guest Role
• 
  Lee Yoon Sang

  [Judge Seo’s colleague] (Ep. 13)

  Guest Role
• 
  Lee Chang Jik

  [Judge Seo’s colleague] (Ep. 13)

  Guest Role
• 
  Jang Tae Min

  Lee Seung Hun [Murder victim] (Ep. 13)

  Guest Role
• 
  Han Seung Hyun

  [Medical examiner] (Ep. 13-14)

  Guest Role
• 
  Gu Bon Jin

  [Van driver tazed by Ji Wook] (Ep. 14)

  Guest Role
• 
  Lee Doo Suk

  [Se Yeon's doctor] (Ep. 14)

  Guest Role
• 
  Lee Gyu Sub

  [Ji Wook's informant] (Ep. 15)

  Guest Role
• 
  Ok Joo Ri

  [Realtor] (Ep. 15)

  Guest Role
• 
  Park Joo Yong

  [Apartment security reviews CCTV footage] (Ep. 15)

  Guest Role
• 
  Seol Chang Hee

  [Trial prosecutor] (Ep. 16)

  Guest Role
• 
  Lee Joon Hee

  [Lawyer] (Ep. 16)

  Guest Role
• 
  Shin Deok Ho

  [Judge] (Ep. 16)

  Guest Role
• 
  Park Min Young

  [Mi Do's office employee]

  Guest Role
• 
  Choi Na Moo

  [Gossiping ER nurse after Se Yeon's collapse]

  Guest Role
• 
  Kim Mi Hwa

  [Landlord]

  Guest Role
• 
  Yang Han Yeol

  Cha Min [Young]

  Guest Role
• 
  Choi Da In

  Park Mi Jin [Murder victim]

  Guest Role
• 
  Shim Yoon Bo

  Kim Sil Jang [Secretary, Lan Cosmetic's]

  Guest Role
• 
  Yong Jin

  [Driver, Lan Cosmetic's]

  Guest Role
• 
  Choi Soo Hyun

  [Murder victim]

  Guest Role
• 
  Kim Yeon Ung

  Seo Ji Wook [Young]

  Guest Role
• 
  Song Chang Gyu

  [Funeral director]

  Guest Role
• 
  Lee Seung Hee

  [Nurse]

  Guest Role
• 
  Han Bom

  [Emergency Room Nurse]

  Guest Role
• 
  Song Min Jae

  [Child crying at door of operating room]

  Guest Role
• 
  Lee Ji Wan

  [Student who throws the ball]

  Guest Role
• 
  Kim Jung Ho

  [Cardboard Box man]

  Guest Role
• 
  Ha Kyung Min

  [Lawyer of Lan Cosmetic's]

  Guest Role
• 
  Kim Dong Hyun

  Cha Seung Bok [Cha Min's father]

  Guest Role
• 
  Park So Young

  [Flight attendant]

  Guest Role
• 
  Lee Sun Young

  [Lan Cosmetic's staff admires Cha Min]

  Guest Role
• 
  Won Geun Hee

  [Nursing Home Director]

  Guest Role
• 
  Lee Ji Min

  [Nurse]

  Guest Role
• 
  Kyung Ki Hyun

  [Ice cream vendor in amusement park]

  Guest Role
• 
  Yoo Young Bin

  [Deliveryman]

  Guest Role
• 
  Kim Ji Hye

  [Nurse]

  Guest Role
• 
  Ryu Yeon Seok

  [Paramedic]

  Guest Role
• 
  Han Sa Myung

  Im Jun Hyeok [Judge Seo’s hired PI] (Ep. 12-13)

  Guest Role

Unknown

• 
  Yang Jo Ah Unknown
• 
  Park Sung Geun Unknown
• 
  Jeon Bae Soo Unknown
• 
  Ahn Soo Bin Unknown
• 
  Kim Oh Bok Unknown
• 
  Kim Seung Tae Unknown
• 
  Kim Joo Young Unknown