Bad and Crazy

Director

• 
  Yoo Seon Dong

Screenwriter

• 
  Kim Sae Bom

Main Role

• 
  Lee Dong Wook

  Ryu Soo Yeol

  Main Role
• 
  Wi Ha Joon

  "K"

  Main Role
• 
  Han Ji Eun

  Lee Hee Kyum

  Main Role
• 
  Cha Hak Yeon

  Oh Kyung Tae

  Main Role

Support Role

• 
  Sung Ji Ru

  Kwak Bong Pil [Anti-corruption chief]

  Support Role
• 
  Cha Shi Won

  Yang Jae Seon [Team 2 inspector, Anti-Corruption Investigation Div.]

  Support Role
• 
  Lee Jin Hong

  Yang Jae Seon [Team 2, Anti-Corruption Investigation Div.]

  Support Role
• 
  Lee Hwa Ryong

  Kim Kye Shik [Team 1 Leader, Narcotics Crime investigation]

  Support Role
• 
  Shin Ju Hwan

  Heo Jong Goo [Narcotics Crime Investigation, Team 1]

  Support Role
• 
  Jo Dong In

  Jung Chan Ki [Narcotics Crime Investigation, Team 1]

  Support Role
• 
  Lee Seung Heon

  Kim Kyung Joon [Narcotics Crime Investigation, Team 1]

  Support Role
• 
  Lee Sang Hong

  Do In Beom [Munyang Police, homicide detective]

  Support Role
• 
  Kim Hi Eo Ra

  Boss Yong [Drug gang head]

  Support Role
• 
  Won Hyun Joon

  Andrei Kang [Henchman]

  Support Role
• 
  Kang Ae Sim

  Seo Seung Sook

  Support Role
• 
  Kim Dae Gon

  Ryu Dong Yeol [Soo Yeol's elder brother]

  Support Role
• 
  Im Ki Hong

  Do Yu Gon [Assemblyman]

  Support Role
• 
  Park Se Joon

  Nam Eun Seok [Prosecutor trainee]

  Support Role
• 
  Choi Kwang Je

  Yum Geun Soo [Heart Mender Clinic]

  Support Role
• 
  Han Ki Joong

  Commissioner Kim Sung Ho

  Support Role
• 
  Yoo Jung Ho

  Ju Dae Won

  Support Role
• 
  Jung Sung Il

  Sin Ju Hyeok [Dream Youth Shelter therapist]

  Support Role
• 
  Kim Jung Hoon

  Jeong Il Su

  Support Role

Guest Role

• 
  Han Sang Chul

  [Fight spectator] (Ep. 1)

  Guest Role
• 
  Ji Sung Geun

  [Apartment building staff] (Ep. 1)

  Guest Role
• 
  Choi Yi Sun

  [Bathhouse cashier] (Ep. 1)

  Guest Role
• 
  Kim Jae Man

  Kim Dong Gyun [Police officer] (Ep. 1)

  Guest Role
• 
  Nam Jung Woo

  [Police officer] (Ep. 1)

  Guest Role
• 
  Lee Jae Eun

  [Landlord] (Ep. 1)

  Guest Role
• 
  Lee Joong Yul

  [Apartment security guard] (Ep. 1)

  Guest Role
• 
  Kang Jung Im

  [Yoo Na's neighbor] (Ep. 1)

  Guest Role
• 
  Park Yong

  [Disciplinary hearing officer] (Ep. 1)

  Guest Role
• 
  Park Sang Hyuk

  [Disciplinary hearing officer] (Ep. 1)

  Guest Role
• 
  Park Seon Joo

  Mrs. Do (Ep. 1)

  Guest Role
• 
  Yu Seung Il

  [General contractor] (Ep. 1-2)

  Guest Role
• 
  Yoon Tae In

  [Detective] (Ep. 1-2, 4)

  Guest Role
• 
  Lee Seo An

  Jung Yoo Na (Ep. 1-4)

  Guest Role
• 
  Kim Si Ha

  Jung In Seon [Yoo Na's daughter] (Ep. 1-2, 4)

  Guest Role
• 
  Lee Joo Hyun

  Tak Min Soo (Ep. 1, 4-5)

  Guest Role
• 
  Lee Kyung Wook

  Shim Sang Ho (Ep. 1, 5-6)

  Guest Role
• 
  Kim Moon Ho

  [Street cleaner] (Ep. 2)

  Guest Role
• 
  Seol Chang Hee

  [NFS technician] (Ep. 2)

  Guest Role
• 
  Park Yoo Mil

  [Dong Yeol's girlfriend] (Ep. 2)

  Guest Role
• 
  Lee Dong Gyu

  [TVC reporter] (Ep. 2)

  Guest Role
• 
  Im Sung Jae

  President Ma [Mobile funeral home boss] (Ep. 2-3)

  Guest Role
• 
  Kim Kyu Baek

  [Yu Na's brother] (Ep. 2, 4)

  Guest Role
• 
  Im Sung Mi

  Yoon Yi Seul (Ep. 2, 9)

  Guest Role
• 
  Park Ji Hong

  Su Jan (Ep. 2-3, 10)

  Guest Role
• 
  Nam Woo Joo

  Jung Hyun Soo (Ep. 2, 5-6, 10)

  Guest Role
• 
  Park Seon Hu

  Ryu Dong Yeol [Young] (Ep. 3, 9)

  Guest Role
• 
  Nam Do Yoon

  Ryu Soo Yeol / In Jae Hui [Young] (Ep. 3, 8-10, 12)

  Guest Role
• 
  Jun Joon Woo

  [Attorney] (Ep. 4)

  Guest Role
• 
  Kim Nam Jin

  [Dream Youth shelter director] (Ep. 4)

  Guest Role
• 
  Kim Hyun Mok

  [Witness] (Ep. 4-5)

  Guest Role
• 
  Lee Jong Yun

  Lim [Detective] (Ep. 4-5, 12)

  Guest Role
• 
  Kim Hwa Joong

  Eun Young Ho (Ep. 4, 8)

  Guest Role
• 
  Kim Won Seok

  [Detective] (Ep. 5)

  Guest Role
• 
  Yoon Dae Yeol

  [Beaten gang member] (Ep. 5)

  Guest Role
• 
  Kyung Ki Hyun

  [Suspect] (Ep. 5)

  Guest Role
• 
  Yum Jung Goo

  [Gyeong Jun's father] (Ep. 5)

  Guest Role
• 
  Min Jung Sup

  [Detective] (Ep. 5)

  Guest Role
• 
  Hong Seong Gwan

  [Friend of witness] (Ep. 5)

  Guest Role
• 
  Choi Gyo Shik

  [Junkyard worker] (Ep. 5)

  Guest Role
• 
  Joo Yeon Ah

  [Rehab center nurse] (Ep. 6)

  Guest Role
• 
  Shin Joo Hyup

  Woo Hyeok Jin (Ep. 6)

  Guest Role
• 
  Kim Shin Rock

  [Prisoner] (Ep. 6)

  Guest Role
• 
  Han Sa Myung

  [Junkyard guy] (Ep. 6)

  Guest Role
• 
  Han Ji Ho

  [Commissioner's nephew] (Ep. 6-7)

  Guest Role
• 
  Kim Joo Young

  [Gang member] (Ep. 6-7)

  Guest Role
• 
  Choi Bo Kwang

  [Jae Sun's wife] (Ep. 7)

  Guest Role
• 
  Shin Na Ra

  [Gang member] (Ep. 7)

  Guest Role
• 
  Noh Jung Hwan

  [Eyes Candy cashier] (Ep. 7)

  Guest Role
• 
  Lee Joo Young

  Park Yi Hyun (Ep. 7-8)

  Guest Role
• 
  Park Se In

  [Nurse] (Ep. 8)

  Guest Role
• 
  Kim Bi Bi

  [Teacher] (Ep. 8)

  Guest Role
• 
  Hong Je In

  Ko Ga Young (Ep. 8)

  Guest Role
• 
  Lee Jae Hak

  [Student bully] (Ep. 8)

  Guest Role
• 
  Lee Ji Wan

  [Student bully] (Ep. 8)

  Guest Role
• 
  Gu Da Song

  [Student bully] (Ep. 8)

  Guest Role
• 
  Lee Jon Seung

  [Student bully] (Ep. 8)

  Guest Role
• 
  Kim Yong Han

  Shim Soo Hoon [Jung Hoon's brother] (Ep. 8-9)

  Guest Role
• 
  Shin Moon Sung

  [Soo Yeol's father] (Ep. 8-9)

  Guest Role
• 
  Park Seo Yeon

  Baek Young Joo (Ep. 8-9, 11)

  Guest Role
• 
  Kim Mi Hwa

  [Eun Seok's mother] (Ep. 8, 10, 12)

  Guest Role
• 
  Park Min Sang

  Shim Jung Hoon (Ep. 8-9, 11-12)

  Guest Role
• 
  Seo Jeong Hoo

  [Policeman] (Ep. 9)

  Guest Role
• 
  Kim Ik Tae

  Keum Young Soo [Attorney] (Ep. 9)

  Guest Role
• 
  Jang In Ho

  [Detective] (Ep. 9)

  Guest Role
• 
  Oh Ki Hwan

  [Detective] (Ep. 9)

  Guest Role
• 
  Bae Bo Ram

  [Social worker] (Ep. 9)

  Guest Role
• 
  Jung Sang Hoon

  Jung Gang Jae (Ep. 9)

  Guest Role
• 
  Yi Seo

  Ki So Yeon (Ep. 9-10)

  Guest Role
• 
  Yang Dae Hyuk

  Park Sung Gwan (Ep. 9-10)

  Guest Role
• 
  Jung Yoon Suk

  Jung Yoon Ho (Ep. 9-10, 12)

  Guest Role
• 
  Jung Sun Chul

  [Drug dealer] (Ep. 10)

  Guest Role
• 
  Kim Chil Doo

  [Motorcyclist] (Ep. 10)

  Guest Role
• 
  Eom Ji Man

  [Police officer] (Ep. 10)

  Guest Role
• 
  Jung Doo Won

  [Host bar owner] (Ep. 10)

  Guest Role
• 
  Lee Dong Yong

  [Jung Hoon's uncle] (Ep. 10)

  Guest Role
• 
  Kim Young Joo

  Sin Ju Hyeok [Painter] (Ep. 10-11)

  Guest Role
• 
  Jang Nam Boo

  Sung Bok Jun (Ep. 9-11)

  Guest Role
• 
  Kim Yong Jin

  [NFS medical examiner] (Ep. 11)

  Guest Role
• 
  Park Joong Geun

  [Nurse] (Ep. 11-12)

  Guest Role
• 
  Kim Seon Hwa

  Dr. Hong Suk Kyung [Psychiatrist] (Ep. 11-12)

  Guest Role
• 
  Lee Ha Nee

  [Psychiatric patient] (Ep. 12)

  Guest Role
• 
  Jo Kyun Hyung

  [Psychiatric patient] (Ep. 12)

  Guest Role
• 
  Park Ki Ryung

  Kang Sung Dae (Ep. 12)

  Guest Role
• 
  Ma Jung Pil

  [Attorney] (Ep. 12)

  Guest Role
• 
  Kim Jung Hoon

  Jeong Il Soo

  Guest Role

Unknown

• 
  Park No Kyeong Unknown
• 
  Park Se Hoon Unknown