A Killer Paradox

Cinematography

• 
  Park Se Seung

Composer

• 
  Dalpalan

Director

• 
  Lee Chang Hee

Screenwriter

• 
  Kim Da Min

Main Role

• 
  Choi Woo Shik

  Lee Tang

  Main Role
• 
  Son Suk Ku

  Jang Nan Gam

  Main Role
• 
  Lee Hee Joon

  Song Chon

  Main Role

Support Role

• 
  Kim Yo Han

  Roh Bin

  Support Role
• 
  Lee Joong Ok

  Kang Sang Muk

  Support Role
• 
  Choi Sun Woo

  Gyeong Hwan

  Support Role
• 
  Im Se Ju

  Choi Gyeong A

  Support Role
• 
  Jeong E Suh

  Seon Yeo Ok

  Support Role
• 
  Kwon Da Ham

  Yong Jae

  Support Role
• 
  Roh Jae Won

  Ha Sang Min

  Support Role
• 
  Hyun Bong Sik

  Park Hyeong Sa

  Support Role
• 
  Lee Ji Hoon

  Moon Myeong Jun

  Support Role
• 
  Han Ji An

  Hyung Ji Su

  Support Role

Guest Role

• 
  Moon Young Dong

  Lee Gwang Hun (Ep. 1)

  Guest Role
• 
  Lee Su Hyung

  [Expert] (Ep. 1)

  Guest Role
• 
  Lee So Geum

  [Customer] (Ep. 1)

  Guest Role
• 
  Kim Geum Soon

  [Gwang Hun’s wife] (Ep. 1)

  Guest Role
• 
  Jeon Hyun Sook

  Deacon Lee (Ep. 2)

  Guest Role
• 
  Lee Yoon Soo

  [Bank teller] (Ep. 2)

  Guest Role
• 
  Jang Sun

  Jae Sun (Ep. 3)

  Guest Role
• 
  Jung Ah Young

  Kang Yeon Seo [Young] (Ep. 3)

  Guest Role
• 
  Yoon Seo Jin

  [Kang Yeon Seo’s friend] (Ep. 3)

  Guest Role
• 
  Joo In Young

  [Jae Jun’s mother] (Ep. 3)

  Guest Role
• 
  Lee Ji Hae

  [Detective Park’s wife] (Ep. 3, 8)

  Guest Role
• 
  Han Yoon Ji

  Lee Hyeon Ji (Ep. 5)

  Guest Role
• 
  Song Hyung Soo

  Professor No (Ep. 5)

  Guest Role
• 
  Kim Tae Moon

  [Doctor] (Ep. 5)

  Guest Role
• 
  Seol Chang Hee

  [Soo Mart manager] (Ep. 5)

  Guest Role
• 
  Jo Yi Peul

  [University student] (Ep. 5)

  Guest Role
• 
  Kim Do Yeon

  [Soo Mart employee] (Ep. 5)

  Guest Role
• 
  Kim Han Jong

  [Soo Mart employee] (Ep. 5)

  Guest Role
• 
  Lee Joo Young

  [Choi Gyeong A’s mom] (Ep. 5)

  Guest Role
• 
  Kim Sun Hye

  [Convenience store owner] (Ep. 5)

  Guest Role
• 
  Han Ji An

  Hyeong Ji Su (Ep. 6)

  Guest Role
• 
  Kim Dong Hoon

  Ji Su's boyfriend (Ep. 6)

  Guest Role
• 
  Han Sang Kyung

  [Gangster] (Ep. 6-7)

  Guest Role
• 
  Han Yi Jin

  [Gajok Construction executive] (Ep. 6-7)

  Guest Role
• 
  Seung Eui Yeol

  Hyeong Jeong Guk (Ep. 7)

  Guest Role
• 
  Shin Tae Yang

  Roh Bin [Young] (Ep. 7)

  Guest Role
• 
  Kang Jee Seok

  Jang Nan Gam [Teen] (Ep. 7)

  Guest Role
• 
  Jang Eui Don

  [Party official] (Ep. 7)

  Guest Role
• 
  Yoo Il Han

  [Mapo detective] (Ep. 7)

  Guest Role
• 
  Jang Se Won

  [CCTV center staff] (Ep. 7)

  Guest Role
• 
  Yoon Dan Bi

  [CCTV center staff] (Ep. 7)

  Guest Role
• 
  Jo Nam Yung

  [Jeong Guk’s bodyguard] (Ep. 7)

  Guest Role
• 
  Kim Yun Bae

  [Jeong Guk’s bodyguard] (Ep. 7)

  Guest Role
• 
  Mi So Yun

  [Dog shelter staff] (Ep. 7-8)

  Guest Role
• 
  Choi Seong Hyuk

  [Cellphone repairman] (Ep. 7-8)

  Guest Role
• 
  Shin Mi Young

  Ms. Hwang (Ep. 8)

  Guest Role
• 
  Kwon Hyuk Sung

  [Factory manager] (Ep. 8)

  Guest Role
• 
  Kim Min Joo

  Lee Yeong

  Guest Role
• 
  Oh Hye Won

  Lee Yu Jeong

  Guest Role
• 
  Choi Yoon Suk

  Lee Chang Taek

  Guest Role
• 
  Jung Hoe Rin

  Jung Eun Seon

  Guest Role
• 
  Oh Woo Ri

  Kang Mi Yeong

  Guest Role
• 
  Yang Mal Bok

  Shin Jeong Hui

  Guest Role
• 
  Oh Min Ae

  Deacon Kim

  Guest Role
• 
  Nam Jin Bok

  Prosecutor Ji

  Guest Role
• 
  Lee Sang Won

  Kim Jun Hyeok [Detective]

  Guest Role
• 
  Park Ji Han

  Jung Gang Hyo [Manager]

  Guest Role
• 
  Park Kyung Geun

  [Captain]

  Guest Role
• 
  Lee Jae Woong

  [Detective]

  Guest Role
• 
  Heo Seon Haeng

  [Lee Tang’s dad]

  Guest Role
• 
  Lee Won Hee

  [Forensics officer]

  Guest Role
• 
  Choi Won

  [Busan detective]

  Guest Role
• 
  Seon Yul U

  [Busan detective]

  Guest Role
• 
  Kim Tae Joon

  [Team 2 detective]

  Guest Role
• 
  Choi Hee Do

  [Team 2 detective]

  Guest Role
• 
  Kim Eun Woo

  [Team 3 detective]

  Guest Role
• 
  Im Seung Min

  Lee Yong Hun

  Guest Role
• 
  Baek Yu Sung

  Lee Jin Sung

  Guest Role
• 
  Jo Hyun Woo

  Yeo Bu Il (Ep. 1)

  Guest Role
• 
  Lee So Won

  Kang Yeon Seo (Ep. 3)

  Guest Role
• 
  Seo Jae Kwon

  Kang Jae Jun

  Guest Role
• 
  Ryu Jae Hyuk

  [High school bully] (Ep. 1)

  Guest Role
• 
  Choi Mi Geum

  [Board game club member] (Ep. 1)

  Guest Role
• 
  Han Sang Bong

  [Inn owner] (Ep. 7)

  Guest Role