Detectives in Trouble

Director

• 
  Kwon Gye Hong

Producer

• 
  Lee Eun Jin

Screenwriter

• 
  Park Seong Jin
• 
  Lee Su Hyeon

Main Role

• 
  Song Il Gook

  Park Se Hyeok

  Main Role
• 
  Lee Jong Hyuk

  Jung Il Do

  Main Role
• 
  Song Ji Hyo

  Cho Min Ju

  Main Role
• 
  Park Sun Young

  Heo Eun Yeong

  Main Role

Support Role

• 
  Kim Joon

  Sin Dong Seok

  Support Role
• 
  Sung Ji Ru

  Nam Tae Sik

  Support Role
• 
  Jang Hang Sun

  Team Leader Kwon

  Support Role
• 
  Baek Seung Hee

  Sin Yu Mi [Min Ju's friend]

  Support Role
• 
  Sun Wook Hyun

  Petit Jang

  Support Role
• 
  Oh Yong

  Reporter Nam

  Support Role
• 
  Park Jung Woo

  Kim Cheol Min

  Support Role
• 
  Kim Yoo Bin

  Park Hae In

  Support Role
• 
  Park Yong Soo

  Park Yeong Seok

  Support Role
• 
  Song Min Hyung

  Deputy Heo

  Support Role
• 
  Kim Kyu Chul

  Cho Sang Tae

  Support Role
• 
  Um Hyo Sup

  Hong Seok Yeong

  Support Role
• 
  Choi Eun Suk

  Yoo Myeong Cheol

  Support Role
• 
  Choi In Sook

  [Min Ju's mother]

  Support Role

Guest Role

• 
  Jung Ho Geun

  [Internal investigation] (Ep. 4)

  Guest Role
• 
  Jang Nam Yul

  Ma Jong Pil (Ep. 1)

  Guest Role
• 
  Jo Jae Yun

  Yang Do Su (Ep. 1)

  Guest Role
• 
  Seong Chan Ho

  [Victim's father] (Ep. 1)

  Guest Role
• 
  Jung Tae Ho

  (Ep. 1)

  Guest Role
• 
  Yang Joo Ho

  Choi Tae Su (Ep. 1-3)

  Guest Role
• 
  Lee Min Woo

  Lee Dong Suk (Ep. 1-3)

  Guest Role
• 
  Choi Min

  Byeon Sang Tae (Ep. 1-3)

  Guest Role
• 
  Sun Woo Sun

  Jin Mi Suk (Ep. 1-7)

  Guest Role
• 
  Kang Hae In

  O Eun Ha (Ep. 2)

  Guest Role
• 
  Chae In Woo

  Kim Seok Gyu (Ep. 3-4)

  Guest Role
• 
  Jang Joon Hak

  [Autopsy] (Ep. 3)

  Guest Role
• 
  Park Joon Hyuk

  Kang Seong Chepl (Ep. 3-4)

  Guest Role
• 
  Oh Ji Yeon

  O Eun Ju (Ep. 3)

  Guest Role
• 
  Kim Kyung Ryong

  Mr. Min (Ep. 3-4)

  Guest Role
• 
  Lee Yun Ju

  Seol Hui (Ep. 3-4)

  Guest Role
• 
  Son Yeo Eun

  Cha Su Yeon (Ep. 5-7)

  Guest Role
• 
  Choo So Young

  Yun Seong Hui (Ep. 5-7)

  Guest Role
• 
  Seo Kwon Soon

  [Seong Hui' mother] (Ep. 5-7)

  Guest Role
• 
  Geum Ho Suk

  Lee Jun Su (Ep. 5-7)

  Guest Role
• 
  Kim Ri Na

  Kim Jun Hui (Ep. 5-7)

  Guest Role
• 
  Lee Young Hoon

  Kim Yeong Tae (Ep. 5-7)

  Guest Role
• 
  Cheon Young Min

  Mi Suk [Teen] (Ep. 7)

  Guest Role
• 
  Kim Min Chae

  [So Yeong's mother] (Ep. 7)

  Guest Role
• 
  Evan

  Alex Lee (Ep. 7-8)

  Guest Role
• 
  Kim Yoon Hye

  Lee So Min (Ep. 7-8)

  Guest Role
• 
  Heo Eun Jung

  Kim So Yeong (Ep. 7-8)

  Guest Role
• 
  Chae Min Young

  Han Song Hui (Ep. 7-8)

  Guest Role
• 
  Yoo Pil Ran

  [Lee So Min's mother] (Ep.8)

  Guest Role
• 
  Song Kyung Hwa

  [Song Hui's mother] (Ep. 8)

  Guest Role
• 
  Kim Sun Kyung

  Im Gyeong Eun (Ep. 9-16)

  Guest Role
• 
  Lee El

  Yoo Hye Mi (Ep. 9-10)

  Guest Role
• 
  Song Shi Yeon

  Park Eun A (Ep. 9-10)

  Guest Role
• 
  Nam Myeong Ryeol

  Kang Man Su (Ep. 9-10)

  Guest Role
• 
  Lee Ju Seok

  Park Byeong Gwong (Ep. 9-10)

  Guest Role
• 
  In Sung Ho

  [Witness] (Ep. 9-10)

  Guest Role
• 
  Yoon Sun Woo

  Lee Youg Jun (Ep. 11-12)

  Guest Role
• 
  Shin Seon Hee

  [Yeong Jun's mother] (Ep. 11-12)

  Guest Role
• 
  Seo Jung Wook

  [Psychiatric hospital's manager] (Ep. 12)

  Guest Role
• 
  Kim Seon Eun

  [Reporter] (Ep. 13)

  Guest Role
• 
  Won Jong Rye

  [Il Do's mother] (Ep. 13)

  Guest Role
• 
  Ra Hee Jung

  [Hye Ran's neighbor] (Ep. 13)

  Guest Role
• 
  Lee Ju Eun

  Yu Ri (Ep. 13-14)

  Guest Role
• 
  Uhm Hyun Kyung

  Seo Hye Ran (Ep. 13-14)

  Guest Role
• 
  Baek Yoon Shik

  Bang Seong Jin (Ep. 13-14)

  Guest Role
• 
  Yoon Jin Ho

  [Reporter] (Ep. 13-14)

  Guest Role
• 
  Kim Young Hoon

  Ji Yeong Ho (Ep. 13-15)

  Guest Role
• 
  Kim Gwang In

  [Seong Jin's lawyer] (Ep. 14)

  Guest Role
• 
  Shin Chi Young

  [Policeman] (Ep. 14)

  Guest Role
• 
  Park Kyu Jum

  Kim Hong Tae [Serial Murder Detective] (Ep. 15)

  Guest Role
• 
  Do Ha

  Jung Il Do [Young]

  Guest Role
• 
  Hwang Kwang Hee

  [Se Hyeok's former student]

  Guest Role

Unknown

• 
  Lee Hui Sung Unknown
• 
  Choi Ha Ho Unknown