Trap

Assistant Director

• 
  Choi Sung Hyun

Composer

• 
  Koo Ja Wan

Director

• 
  Lee Jae Gyoo

Screenwriter

• 
  Nam Sang Wook

Screenwriter & Director

• 
  Park Shin Woo

Main Role

• 
  Lee Seo Jin

  Kang U Hyeon

  Main Role
• 
  Sung Dong Il

  Go Dong Kook

  Main Role
• 
  Im Hwa Young

  Yoon Seo Young

  Main Role

Support Role

• 
  Kim Kwang Gyu

  Jang Man Ho

  Support Role
• 
  Seo Young Hee

  Shin Yeon Soo

  Support Role
• 
  Yoon Kyung Ho

  Mr. Yun [Coffee owner]

  Support Role
• 
  Lee Joo Bin

  Kim Shi Hyun [Woo Hyun's secretary]

  Support Role
• 
  Lee Si Hoon

  Young Master

  Support Role
• 
  Dong Hyun Bae

  Reporter Seo [Reporter]

  Support Role
• 
  Jang Sung Bum

  Park Sung Bum [Detective]

  Support Role
• 
  Oh Han Kyul

  Gang Shi Woo [Woo Hyun's son]

  Support Role
• 
  Choi Hong Il

  Profiler Suk [Seo Yeong's superior]

  Support Role
• 
  Oh Ryoong

  Hong Won Tae [Representative]

  Support Role
• 
  Lee Na Ra

  Park Sun Mi [Min Joo's mother]

  Support Role
• 
  Choi Myung Bin

  Go Min Joo [Dong Gook's daughter]

  Support Role
• 
  Kwak Min Ho

  Detective Gwang Su Dae

  Support Role
• 
  Jang Won Hyung

  Ho Gae

  Support Role
• 
  Byun Hee Bong

  Kim Shin Woo

  Support Role
• 
  Choi Jae Sub

  Reporter Go [Reporter]

  Support Role
• 
  Oh Chang Kyung

  Yang Duk Chul [Detective]

  Support Role
• 
  Baek Ji Won

  Mrs. Jo

  Support Role
• 
  Kwon Hyuk Bum

  [Mrs. Jo's subordinate]

  Support Role
• 
  Choi Bum Ho

  [Search team leader]

  Support Role
• 
  Sung Hyuk

  [Hunter]

  Support Role
• 
  Oh Man Seok

  [Hunter]

  Support Role
• 
  Kim Jung Soo

  [Head officer]

  Support Role
• 
  Lee Kwang Se Support Role
• 
  Son Ji Yoon

  [Autopsy]

  Support Role

Guest Role

• 
  Jo Dal Hwan

  Bae Nam Su [Detective] (Ep. 1)

  Guest Role
• 
  Lee Joon Hee

  [Director] (Ep.1)

  Guest Role
• 
  Nam Jung Hee

  [Grandma with dementia] (Ep.2)

  Guest Role
• 
  Park Jin Yeong

  [Gambler] (Ep. 3)

  Guest Role
• 
  Carson Allen

  [Gambling room coffee girl] (Ep.3)

  Guest Role
• 
  Yeo Moo Young

  [Bae Nam Soo's father]

  Guest Role
• 
  Lee Sung Woo

  [Dealer]

  Guest Role
• 
  Jung Myung Joon

  [Politician]

  Guest Role
• 
  Jin Hyun Kwang

  [Police officer]

  Guest Role
• 
  Han Chang Min

  Ko Min Seok

  Guest Role
• 
  Ha Hoe Jung Guest Role
• 
  Byun Seong Beom Guest Role
• 
  Park Chul Min Guest Role
• 
  Jo Kyung Hoon Guest Role
• 
  Hong Ye Ji

  Police Officer Hwang (Ep.2)

  Guest Role
• 
  Park Ji Yun

  [Detective undercover nurse]

  Guest Role
• 
  Gyeol Hwi Guest Role
• 
  Choi Seo Hyuk Guest Role
• 
  Lee Hong Nae Guest Role
• 
  Kim Mi Hye

  [Reporter] (Ep. 6)

  Guest Role
• 
  Seo Eun Sol

  Go Min Joo [Young]

  Guest Role
• 
  Kim Mi Ji

  [ER nurse]

  Guest Role
• 
  Oh Seung Chan

  [Doctor]

  Guest Role
• 
  Lee Kun Goo

  [Bodyguard]

  Guest Role
• 
  Oh Jin Seok

  [Korean in China]

  Guest Role
• 
  So Yun Ho

  [TV station PD]

  Guest Role

Bit part

• 
  Kang Eun Bin

  [Nurse]

  Bit part
• 
  Jung Je Woo Bit part

Unknown

• 
  Jin Shi Won Unknown
• 
  Kang Hak Soo Unknown
• 
  Kim Byung Chul Unknown
• 
  Kim Seo Yeon Unknown