Unknown Woman

Chief Producer

• 
  Kim Sung Geun

Director

• 
  Kim Myeong Uk

Screenwriter

• 
  Moon Eun Ah

Main Role

• 
  Oh Ji Eun

  Son Yeo Ri

  Main Role
• 
  Seo Ji Suk

  Kim Moo Yul

  Main Role
• 
  Park Yoon Jae

  Goo Do Chi

  Main Role
• 
  Choi Yoon So

  Goo Hae Joo

  Main Role
• 
  Bae Jong Ok

  Hong Ji Won

  Main Role

Support Role

• 
  Park Joon Hyuk

  Oliver Jang

  Support Role
• 
  Han Gap Soo

  Son Ju Ho

  Support Role
• 
  Bang Eun Hee

  Jang Ae Nok [Mu Yeol and Yeol Mae's mother]

  Support Role
• 
  Byun Woo Min

  Gu Do Yeong

  Support Role
• 
  Jung Yoo Geun

  Goo Do Chi [Young]

  Support Role
• 
  Kim Ji An

  Kim Ma Ya / Bom Son

  Support Role
• 
  Choi Hyun Joon

  Kim Ga Ya

  Support Role
• 
  Seo Kwon Soon

  Seo Mal Nyeon

  Support Role
• 
  Sun Dong Hyuk

  Yoon Ki Dong [former detective]

  Support Role
• 
  Cho Ye Lin

  Kim Bom [Ma Ya's best friend]

  Support Role
• 
  Sa Hee

  [Gu Do Yeong's secret mistress]

  Support Role
• 
  Yoo Sang Jae

  Detective Lee Pil Gyu

  Support Role
• 
  Hyun Sook Hee

  Jeong Hee Suk [Nursery director]

  Support Role
• 
  Han Ji Woo

  Han So Ra [Actress]

  Support Role
• 
  Kim Seo Ra

  Choi Mi Hee / Angela Choi

  Support Role
• 
  Kim Tae Young

  President Kim Joon Myung

  Support Role
• 
  Park So Jung

  Kim Soon Mi [Kim Bom's Mom]

  Support Role
• 
  Jo Sun Mook

  Kim Jae Gu [Attorney]

  Support Role
• 
  Jung Dong Gyu

  Director Kim

  Support Role
• 
  Jo Sung Hee

  Secretary Kim

  Support Role
• 
  Yoon Kap Soo Support Role

Guest Role

• 
  Hoon

  Jang Gu [Goo Do Chi's manager]

  Guest Role
• 
  Lee In Ha

  Kim Yeol Mae [Moo Yul' sister]

  Guest Role
• 
  Kwon Young Kyung Guest Role
• 
  Song Kyung Eui

  [Factory Manager]

  Guest Role
• 
  Kim Seon Eun Guest Role
• 
  Go Jin Myung

  [Hong Ji Won's Nursery Director]

  Guest Role
• 
  Kim Myung Joong Guest Role
• 
  Kang Moon Kyung Guest Role
• 
  Kim Joo Ah Guest Role
• 
  Hong Seung Beom

  [Doctor]

  Guest Role
• 
  Moon Woo Jin

  [Crying child]

  Guest Role
• 
  Choi Yoon Joon

  [Witness]

  Guest Role
• 
  Lee Chang Guest Role
• 
  Kang Min Jung Guest Role
• 
  Kim Gwang In Guest Role
• 
  Lee Soo Bin Guest Role
• 
  Byun Joo Hyun

  [Moneylender]

  Guest Role
• 
  Yoo Ji Yeon

  Park Hye Min / 'Chief' [Prisoner #104]

  Guest Role
• 
  Kim Kwang Hyun

  [Doctor]

  Guest Role
• 
  Baek Bo Ram

  Showhost Ju Won

  Guest Role
• 
  Yang Jae Won Guest Role
• 
  Seo Wang Seok Guest Role
• 
  Kim Sa Hun

  [Han So Ra's common-law husband]

  Guest Role
• 
  Nam Ri An

  [Employee]

  Guest Role
• 
  Ham Jin Sung

  [Man]

  Guest Role
• 
  Joo Seung Hyuk

  Koo Hae Sung

  Guest Role
• 
  Lee Won Jang Guest Role
• 
  Oh Yoo Mi

  [Nurse]

  Guest Role
• 
  Yoon Jong Won

  [Public prosecutor ]

  Guest Role

Unknown

• 
  Min Sang Woo Unknown
• 
  Choi Young Unknown
• 
  Park Tae Yun Unknown