Nine Puzzles

Composer

• 
  Cho Young Wuk

Director

• 
  Yoon Jong Bin

Screenwriter

• 
  Lee Eun Mi

Main Role

• 
  Kim Da Mi

  Yun I Na

  Main Role
• 
  Son Suk Ku

  Kim Han Saem

  Main Role

Support Role

• 
  Kim Sung Kyun

  Yang Jeong Ho [Violent crimes unit 2 team chief]

  Support Role
• 
  Hyun Bong Sik

  Choi San [Violent crimes unit 2 detective]

  Support Role
• 
  Kwak Ja Hyung

  No Su Gwang [Violent crimes unit 2 detective]

  Support Role
• 
  Cha Woo Jin

  An Yeong Ha [Violent crimes unit 2 detective]

  Support Role
• 
  Jang Kyug Su

  Hyun Ho Geun [Hangang Police Station Chief]

  Support Role
• 
  Jung Man Sik

  Tae Dong Su [Captain]

  Support Role
• 
  Ahn So Yo

  Yun Go Eun [Criminal analysis team chief]

  Support Role
• 
  Hong Bi Ra

  Byeon Ji Yun [Criminal analysis team]

  Support Role
• 
  Kim Do Yeon

  Nam Hyeok Su [Criminal analysis team]

  Support Role
• 
  Lee Joo Young

  Nam Na Ri [Police]

  Support Role
• 
  Park Gyu Young

  Lee Seung Ju [Sunlight mental health psychiatrist]

  Support Role
• 
  Roh Jae Won

  Hwang In Chan [Sunlight mental health psychiatrist]

  Support Role
• 
  Ji Su Yeon

  Cho Gi Bbeum [Sunlight mental health nurse]

  Support Role
• 
  Park Sung Yun

  Kong Yeong Im [I Na's housekeeper]

  Support Role

Guest Role

• 
  Gu Hyun

  Choi Jun Seo (Ep. 1)

  Guest Role
• 
  Ki Eun Yoo

  Choi Jun U [Jun Seo's brother] (Ep. 1)

  Guest Role
• 
  Joo Hae Eun

  Yeom Se Ryung [I Na's roommate] (Ep. 1)

  Guest Role
• 
  Han Sung Soo

  [Jun Seo's father] (Ep. 1)

  Guest Role
• 
  Shin Kang Kyun

  [Convenience store owner] (Ep. 1)

  Guest Role
• 
  Ji Jin Hee

  Yun Dong Hun [I Na's uncle] (Ep. 1, 3, 7, 10)

  Guest Role
• 
  Kim Ye Won

  Lee Mi Yeong [Bar madame] (Ep. 1-3, 7, 10)

  Guest Role
• 
  Ko Dong Hyoung

  [Crime scene investigator] (Ep. 1, 11)

  Guest Role
• 
  Park Jeong Yun

  [Bartender] (Ep. 2)

  Guest Role
• 
  Kim Do Geon

  [Police cadet] (Ep. 2)

  Guest Role
• 
  Yoon Hyun Sik

  [Police cadet] (Ep. 2)

  Guest Role
• 
  Son Byung Wook

  [Police executive] (Ep. 2)

  Guest Role
• 
  Jung Han Bin

  [Police executive] (Ep. 2)

  Guest Role
• 
  Kim Kwan Jang

  [Police executive] (Ep. 2)

  Guest Role
• 
  Park Shin Woon

  [Ho Geun's driver] (Ep. 2)

  Guest Role
• 
  Choi Seong Hyuk

  [Apartment security guard] (Ep. 2)

  Guest Role
• 
  Kwon Han Sol

  Yoo Jeung Eun [Bar manager] (Ep. 2-3)

  Guest Role
• 
  Park Mi Hyun

  Hong Ra Eun [Han Saem's mother] (Ep. 2-3, 11)

  Guest Role
• 
  Moon Chang Gil

  Lee Do Won (Ep. 3)

  Guest Role
• 
  Kang Hak Soo

  Lee Du Cheol (Ep. 3)

  Guest Role
• 
  Son Sung Chan

  [Dry cleaners owner] (Ep. 3)

  Guest Role
• 
  Joo In Young

  Yo Yang Won [Nursing home manager] (Ep. 3)

  Guest Role
• 
  Kwak Min Ho

  [Restaurant manager] (Ep. 3-4)

  Guest Role
• 
  Lee Hee Joon

  Kang Chi Mok [Restaurant Chai president] (Ep. 3-4, 7, 10)

  Guest Role
• 
  Cha Shi Won

  [Hired driver] (Ep. 4)

  Guest Role
• 
  Shin Mi Young

  [Y Hotel housekeeper] (Ep. 4)

  Guest Role
• 
  Park Jin Soo

  [Rest stop manager] (Ep. 4)

  Guest Role
• 
  Lee Sang Won

  [Y Hotel receptionist] (Ep. 4)

  Guest Role
• 
  Nam Yoon Ho

  No Jae Uk [Yang Hui's lover] (Ep. 4-5)

  Guest Role
• 
  Ok Ja Yeon

  Seo Yang Hui [Chi Mok's wife] (Ep. 4-6)

  Guest Role
• 
  Park Jin Yeong

  Yeom Dong Han [Recycling plant cleaner] (Ep. 5)

  Guest Role
• 
  Im Chul Hyung

  Kim Gap Jae [Recycling plant worker] (Ep. 5)

  Guest Role
• 
  Choi Woo Jun

  Lee Deok Mun [Recycling plant manager] (Ep. 5)

  Guest Role
• 
  Nam Jin Bok

  Yeo Jung Cheol [Recycling plant worker] (Ep. 5)

  Guest Role
• 
  Choi Hong Il

  Choi Yeong Han [Recycling plant worker] (Ep. 5)

  Guest Role
• 
  Byun Hong Jun

  Choi Dong Gyeong [Yeong Han's son] (Ep. 5)

  Guest Role
• 
  Shin Yeon Woo

  [Jung Cheol’s wife] (Ep. 5)

  Guest Role
• 
  Shin Dong Ryuk

  Seo Do Ho (Ep. 6)

  Guest Role
• 
  Kim Byung Chul

  Reporter Park (Ep. 6)

  Guest Role
• 
  Han Yu Eun

  [Secretary] (Ep. 6)

  Guest Role
• 
  Bae Hyun Kyung

  [Chauffeur] (Ep. 6)

  Guest Role
• 
  Yoon Sang Ho

  [Security guard] (Ep. 6)

  Guest Role
• 
  Song Hyung Soo

  [NFS technician] (Ep. 6)

  Guest Role
• 
  Kwon Bum Taek

  [Dream Land employee] (Ep. 6)

  Guest Role
• 
  Lee Sung Min

  Do Yun Su [DN Construction representive] (Ep. 6-7, 10)

  Guest Role
• 
  Choi Won

  An Hong Jae (Ep. 7)

  Guest Role
• 
  Lim Hyun Sung

  Son In Hwan [Detective] (Ep. 7)

  Guest Role
• 
  Kim Geon U

  Lee Seon Uk [Gang Hyun's son] (Ep. 7)

  Guest Role
• 
  Koo Yu Jin

  Cho Seul Gi [Seon Uk's tutor friend] (Ep. 7)

  Guest Role
• 
  Park Jung Eon

  [Reporter] (Ep. 7)

  Guest Role
• 
  Park Min I

  [Ex-detective] (Ep. 7)

  Guest Role
• 
  Yoon Don Sun

  [Private tutor] (Ep. 7)

  Guest Role
• 
  Lee Eun Ju

  [Apartment mother] (Ep. 7)

  Guest Role
• 
  Bae Jun Hyung

  O Yeong Hun [Cheol Jin's son] (Ep. 7)

  Guest Role
• 
  Park Won Jin

  [Dock manager] (Ep. 7-8)

  Guest Role
• 
  Hwang Jung Min

  O Cheol Jin [Former Sangjin Construction managing director] (Ep. 7-8, 10)

  Guest Role
• 
  Baek Hyun Jin

  Lee Gang Hyun [Journalist] (Ep. 7, 10)

  Guest Role
• 
  Oh Yong

  [Jeju detective] (Ep. 8)

  Guest Role
• 
  Woo Kang Min

  [Jeju detective] (Ep. 8)

  Guest Role
• 
  Jung Chung Gu

  [Jeju police chief] (Ep. 8)

  Guest Role
• 
  Kim Dam Ho

  [Teen orphan] (Ep. 9)

  Guest Role
• 
  Jung Gi Sub

  Kim Mo Il [Mayor] (Ep. 9-10)

  Guest Role
• 
  Park Sung Woong

  Kwon Sang Beom [Jeil law firm advisor] (Ep. 9-10)

  Guest Role
• 
  Park Eung Su

  Park Il Hyeong [Daycare director] (Ep. 9-11)

  Guest Role
• 
  Oh Min Ae

  Lee Nam Suk [Seung Ju's mother] (Ep. 10)

  Guest Role
• 
  Lee Dong Hee

  [Missing children center director] (Ep. 10)

  Guest Role
• 
  Kim Eung Soo

  Kim Mu Ryong [Member of national assembly] (Ep. 10-11)

  Guest Role
• 
  Kang Myoung Soo

  [International High School teacher]

  Guest Role
• 
  Lee Byeong Yong

  [Protestor] (Ep. 9)

  Guest Role
• 
  Lee Seop

  [Pilot]

  Guest Role