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

  Jo Min Joo

  Main Role
• 
  Park Sun Young

  Heo Eun Yeong

  Main Role

Support Role

• 
  Kim Joon

  Shin Dong Suk

  Support Role
• 
  Sung Ji Ru

  Nam Tae Sik

  Support Role
• 
  Sun Woo Sun

  Jin Mi Sook (Ep. 1-7)

  Support Role
• 
  Kim Sun Kyung

  Im Kyeong Eun (Ep.9-16)

  Support Role
• 
  Jang Hang Sun

  Team leader Kwon

  Support Role
• 
  Baek Seung Hee

  Shin Yoo Mi [Min Joo'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 Young Seok

  Support Role
• 
  Song Min Hyung

  Deputy Heo

  Support Role
• 
  Kim Kyu Chul

  Jo Sang Tae

  Support Role
• 
  Choi In Sook

  [Jo Min Joo's mother]

  Support Role
• 
  Um Hyo Sup

  Hong Seok-young

  Support Role
• 
  Choi Eun Suk

  Yoo Myung Cheol

  Support Role

Guest Role

• 
  Jang Nam Yul

  Ma Jong Pil (Ep. 1)

  Guest Role
• 
  Jung Tae Ho

  (Ep.1)

  Guest Role
• 
  Jo Jae Yun

  Yang Do Su (Ep. 1)

  Guest Role
• 
  Hwang Kwang Hee

  [Se Hyuk's former student]

  Guest Role
• 
  Seong Chan Ho

  [Victim's father] (Ep. 1)

  Guest Role
• 
  Kang Hae In

  Oh Eun Ha (Ep.2)

  Guest Role
• 
  Lee Min Woo

  Lee Dong Suk (Ep.1-3)

  Guest Role
• 
  Yang Joo Ho

  Choi Tae Soo (Ep.1-3)

  Guest Role
• 
  Choi Min

  Byeon Sang Tae (Ep. 1-3)

  Guest Role
• 
  Chae In Woo

  Kim Suk Gyu (Ep.3-4)

  Guest Role
• 
  Jang Joon Hak

  (Autopsy) (Ep.3)

  Guest Role
• 
  Park Joon Hyuk

  Kang Sung Chul (Ep.3-4)

  Guest Role
• 
  Kim Kyung Ryong

  Mr. Min (Ep.3-4)

  Guest Role
• 
  Lee Yun Ju

  Seol Hee (Ep.3-4)

  Guest Role
• 
  Oh Ji Yeon

  Oh Eun-joo (Ep.3)

  Guest Role
• 
  Jung Ho Geun

  [Internal investigation] (Ep.4)

  Guest Role
• 
  Son Yeo Eun

  Cha Soo Yun (Ep.5-7)

  Guest Role
• 
  Choo So Young

  Yoon Sung Hee (Ep.5-7)

  Guest Role
• 
  Seo Kwon Soon

  [Yoon Sung Hee' mother] (Ep.5-7)

  Guest Role
• 
  Geum Ho Suk

  Lee Joon-Soo (Ep.5-7)

  Guest Role
• 
  Lee Young Hoon

  Kim Young-tae (Ep.5-7)

  Guest Role
• 
  Heo Eun Jung

  Kim So Young (Ep. 7-8)

  Guest Role
• 
  Kim Yoon Hye

  Lee So Min (Ep.7-8)

  Guest Role
• 
  Chae Min Young

  Han Song Hee (Ep. 7-8)

  Guest Role
• 
  Kim Min Chae

  [Kim So Young's mother] (Ep. 7)

  Guest Role
• 
  Evan

  Alex Lee (Ep.7-8)

  Guest Role
• 
  Cheon Young Min

  [Teenager Mi-sook] (Ep.7)

  Guest Role
• 
  Yoo Pil Ran

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

  Guest Role
• 
  Song Kyung Hwa

  [Han Song Hee's mother] (Ep. 8)

  Guest Role
• 
  Song Shi Yeon

  Park Eun Ah (Ep.9-10)

  Guest Role
• 
  Lee Ju Seok

  Park Byung Gwong (Ep. 9-10)

  Guest Role
• 
  Nam Myeong Ryeol

  Kang Man Soo (Ep.9-10)

  Guest Role
• 
  Lee El

  Yoo Hye Mi (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

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

  Guest Role
• 
  Seo Jung Wook

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

  Guest Role
• 
  Won Jong Rye

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

  Guest Role
• 
  Uhm Hyun Kyung

  Seo Hye Ran (Ep.13-14)

  Guest Role
• 
  Kim Young Hoon

  Ji Young Ho (Ep.13-15)

  Guest Role
• 
  Baek Yoon Shik

  Bang Seong Jin (Ep.13-14)

  Guest Role
• 
  Kim Gwang In

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

  Guest Role
• 
  Ra Hee Jung

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

  Guest Role
• 
  Lee Ju Eun

  Yoo-ri (Ep.13-14)

  Guest Role
• 
  Yoon Jin Ho

  [Reporter] (Ep. 13-14)

  Guest Role
• 
  Kim Seon Eun

  [Reporter] (Ep.13)

  Guest Role
• 
  Shin Chi Young

  [Policeman] (Ep. 14)

  Guest Role
• 
  Park Kyu Jum

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

  Guest Role
• 
  Kim Ri Na

  Kim Jun Hee (Ep. 5-7)

  Guest Role
• 
  Do Ha

  Jung Il Do [Young]

  Guest Role

Unknown

• 
  Lee Hui Sung Unknown
• 
  Choi Ha Ho Unknown