The Lies Within

Director

• 
  Lee Yoon Jung

Screenwriter

• 
  Won Yoo Jung
• 
  Jeon Yeong Sin

Main Role

• 
  Lee Min Ki

  Jo Tae Shik

  Main Role
• 
  Lee Yoo Young

  Kim Seo Hui

  Main Role

Support Role

• 
  Lee Joon Hyuk

  Yoo Dae Yong

  Support Role
• 
  Kim Shi Eun

  Kang Jin Kyung

  Support Role
• 
  Yoon Jong Seok

  Jeon Ho Gyu

  Support Role
• 
  Ohn Joo Wan

  Jin Young Min

  Support Role
• 
  Seo Hyeon Woo

  In Dong Gu

  Support Role
• 
  Moon Chang Gil

  Jung Young Moon [Sang Hun's father]

  Support Role
• 
  Lee Jun Hyuk

  Jung Sang Hun [Seo Hui's husband]

  Support Role
• 
  Kim Jong Soo

  Kim Sung Chul [Seo Hui's father]

  Support Role
• 
  Song Young Chang

  Hong Min Guk

  Support Role
• 
  Ye Soo Jung

  [Coroner]

  Support Role
• 
  Kim Hak Seon

  Kang Man Soo

  Support Role
• 
  Yoon Bok In

  [Seo Hui's mother]

  Support Role
• 
  Min Kyung Jin

  Son Du Gang [Dong Gu's father]

  Support Role
• 
  Lee Seo Hwan

  Choi Chi Deuk

  Support Role
• 
  Hong In

  Kim Pil Yun

  Support Role
• 
  Lee Ho Chul

  Bul Go

  Support Role
• 
  Ryu Seong Hyeon

  Dr. Park

  Support Role
• 
  Jo Ryeon

  Baek In Hye

  Support Role
• 
  Jang Won Hyung

  Go Seung Won

  Support Role
• 
  Ahn Bok Ja

  Tae Shik's mom

  Support Role
• 
  Jang Ji Hoon

  Sing Yeong Cheol [Detective]

  Support Role
• 
  Lee Yoon Jae

  Yoon Jae Min

  Support Role
• 
  Hwang Hee Jung

  Seung Yeon

  Support Role
• 
  Kim Do Young

  Han Joon Seok [Prosecutor]

  Support Role
• 
  Joo Byung Ha

  [Yoon Jae Min's aide]

  Support Role
• 
  Yoon In Jo

  Nam Su Mi

  Support Role
• 
  Song Chang Gyu

  [Chief]

  Support Role
• 
  Shin Hee Chul

  Gwa Su Dae

  Support Role

Guest Role

• 
  Kim Yong Ji

  Choi Soo Hyun (Ep.1, 8-9)

  Guest Role
• 
  Park Ok Chool

  [Hui Sook Coffee Shop owner] (Ep. 2)

  Guest Role
• 
  Kang Hyun Jung

  [Seo Hui's older sister]

  Guest Role
• 
  Jo Hyun Chul

  Park Sung Jae (Ep.6)

  Guest Role
• 
  Ok Joo Ri

  [Chogang Motel owner] (Ep. 6)

  Guest Role
• 
  Kim Tae Yul

  Jo Tae Shik [Young]

  Guest Role
• 
  Kang Suk Won

  [Interrogator] (Ep. 10)

  Guest Role
• 
  Kang Ro Chae

  [Nurse] (Ep. 12)

  Guest Role
• 
  Moon Yong Il

  Chung Shik [Motorcycle delivery] (Ep. 2)

  Guest Role
• 
  Uhm Yoon Jung

  [Reporter]

  Guest Role
• 
  Lee Hye Jo

  [Nurse]

  Guest Role
• 
  Myung Seok Geun

  [Police Officer] (Ep. 11)

  Guest Role
• 
  Park Jung Eon

  Jo Tae Sik's mother (past)

  Guest Role
• 
  Jo Hyun Gun

  Park Do Sik [Commissioner general}

  Guest Role
• 
  Hong Ye Ji

  [Jeong Sang Hun's Secretary] (Ep.1)

  Guest Role
• 
  Kim Woo Jin

  [Police constable]

  Guest Role
• 
  Cha Hee

  [Seo Hee's secretary]

  Guest Role
• 
  Jang Yoo Hwa

  [Police officer]

  Guest Role
• 
  Oh Chi Woon

  Jeon Joo

  Guest Role
• 
  Han Seung Hyun

  [Reporter]

  Guest Role
• 
  Kim Si Eun

  Su Jin [Yoo Dae Yong's daughter]

  Guest Role
• 
  Lee Chang Won Guest Role
• 
  Kim Tae Won

  Jeong Sang Hun (Teen)

  Guest Role
• 
  Lee Kyung Hoon

  In Dong Gu [Young] (Ep.13)

  Guest Role
• 
  Kim Young Sun

  [Dae Yong's wife]

  Guest Role
• 
  Park Se Hoon

  [Patrolman]

  Guest Role
• 
  Kim Sun Yool

  [Jo Tae Sik's sister]

  Guest Role
• 
  Oh Yun Gun

  [Delivery man]

  Guest Role
• 
  Kim Bi Bi

  [Researcher] (Ep. 12)

  Guest Role
• 
  Seo Kwang Jae Guest Role
• 
  Ahn Sung Gun

  [Detective] (Ep.7)

  Guest Role

Unknown

• 
  Son Seon Geun Unknown
• 
  Byun Yoon Jeong Unknown
• 
  Lee Seung Yeol Unknown
• 
  Moon Ju Won Unknown