Team Bulldog: Off-Duty Investigation

Director

• 
  Kang Hyo Jin

Screenwriter

• 
  Lee Yoo Jin
• 
  Jung Yoon Sun

Main Role

• 
  Cha Tae Hyun

  Jin Gang Ho

  Main Role
• 
  Lee Sun Bin

  Kang Mu Yeong

  Main Role
• 
  Jung Sang Hoon

  Lee Ban Seok

  Main Role
• 
  Yoon Kyung Ho

  Teddy Jung

  Main Role
• 
  Ji Seung Hyun

  Tak Won

  Main Role

Support Role

• 
  Im Chul Hyung

  Seo In Jae [Homicide team leader]

  Support Role
• 
  Jang Jin Hee

  Yeon Jang [Red Zone Bar]

  Support Role
• 
  Park Tae San

  Maen Son [Red Zone Bar]

  Support Role
• 
  Song Yoo Hyun

  PD Hong [OCM Fact Check]

  Support Role
• 
  Jung Chan Bi

  Lee Ga Eun

  Support Role
• 
  Park Jung Woo

  Min Dae Jin

  Support Role
• 
  Kim Gyung Shik

  Park Jung Gu [Police chief]

  Support Role
• 
  Son Kwang Eop

  Myung Gi Cheol [OCM's director]

  Support Role
• 
  Park Sung Jun

  Kang Mu Taek

  Support Role
• 
  Kim Young Sung

  Detective Cho

  Support Role
• 
  Seo Hye Won

  Cho So Yu

  Support Role
• 
  Cha Woo Jin

  Park Hyeon Gu [OCM Fact Check]

  Support Role
• 
  Seong Byung Sook

  [Gang Ho's mother]

  Support Role
• 
  Han Yeo Wool

  [OCM Fact check staff]

  Support Role
• 
  Kwak Ji Yoo

  [OCM Fact check staff]

  Support Role
• 
  Na Kyung Min

  [OCM Fact Check host]

  Support Role
• 
  Kim Hong Kyung

  [OCM Fact Check staff]

  Support Role

Guest Role

• 
  Park Chan Woo

  Cho Sang Baek (Ep. 1)

  Guest Role
• 
  Ma Dong Seok

  Jin U Taek [Gang Ho's father] (Ep. 1)

  Guest Role
• 
  Kim Kwang Gyu

  [Gang boss] (Ep. 1)

  Guest Role
• 
  Noh Su Min

  Koo Hyeong Jin (Ep. 1-2)

  Guest Role
• 
  Han Ki Won

  Kim Min Su (Ep. 2)

  Guest Role
• 
  Han Ki Woong

  Kim Min Seok (Ep. 2)

  Guest Role
• 
  Lee Young Suk

  Ji Su Cheol [Shoe repair shop owner] (Ep. 2)

  Guest Role
• 
  Son Byung Wook

  Kang Su (Ep. 2-5)

  Guest Role
• 
  Ji Chan

  Jang Min Gi (Ep. 2-5)

  Guest Role
• 
  Min Kyung Ok

  No Sun I [Granny] (Ep. 2, 9)

  Guest Role
• 
  Jang Hyun Jin

  [Gang boss / Past] (Ep. 3)

  Guest Role
• 
  Lee Jung Do

  [Convenience store clerk] (Ep. 3)

  Guest Role
• 
  Kwon Hyuk Bum

  Lee Tae Sung (Ep. 3, 5)

  Guest Role
• 
  Seo Jin Won

  Han Seok Ho (Ep. 3, 5)

  Guest Role
• 
  Kim Ye Jin

  Kim Jin Gyeong (Ep. 3-5)

  Guest Role
• 
  Jo Seung Yun

  Yoo Seong Guk (Ep. 3-5)

  Guest Role
• 
  Hong Ru Hyeon

  Mrs. Kim [Jeong Man's wife] (Ep. 4)

  Guest Role
• 
  Kim Yong Jin

  [Civil servant] (Ep. 4)

  Guest Role
• 
  Han Hee Jung

  [Clinic receptionist] (Ep. 4)

  Guest Role
• 
  Lee Ha Nee

  Jang Seong Su (Ep. 4-5)

  Guest Role
• 
  Sul Ji Yoon

  Choi Mi Na [Doctor] (Ep. 4-5)

  Guest Role
• 
  Park Jin Young

  [Reporter] (Ep. 5)

  Guest Role
• 
  Moon Ha Yeon

  Kwak Hyeon Suk (Ep. 5, 7-8)

  Guest Role
• 
  Kim Tae Won

  Min Dae Jin [Young] (Ep. 6)

  Guest Role
• 
  Kim Gun

  [Runaway teen] (Ep. 6)

  Guest Role
• 
  Jo Han Ah Reum

  [Runaway teen] (Ep. 6)

  Guest Role
• 
  Uhm Tae Hyun

  Cho Jin Su (Ep. 6-7)

  Guest Role
• 
  Jung Hyun Joong

  Park Jae Min [Young] (Ep. 6-7)

  Guest Role
• 
  Yoo Sung Min

  [Runaway teen] (Ep. 6-7)

  Guest Role
• 
  Park Yoon Young

  [Runaway teen] (Ep. 6-7)

  Guest Role
• 
  Lee Seung Yeol

  Kwon Gi Ung [Young] (Ep. 6-8)

  Guest Role
• 
  Noh Young Hak

  Park Jae Min [Doctor] (Ep. 6, 8-9)

  Guest Role
• 
  Uhm Tae Ok

  [Kimbap vendor] (Ep. 7)

  Guest Role
• 
  Kim Beom Jun

  [Purple coat boy] (Ep. 7)

  Guest Role
• 
  Kim Jin Sung

  Cho Myeong Su (Ep. 7-8)

  Guest Role
• 
  Lee Pung Woon

  Kwon Gi Ung (Ep. 7-8)

  Guest Role
• 
  Kim Hyeon Tae

  [Oni member] (Ep. 8)

  Guest Role
• 
  Park Jung Eon

  [Motel owner] (Ep. 8)

  Guest Role
• 
  Gong Yoo Seok

  [Gas station owner] (Ep. 8)

  Guest Role
• 
  Jang Eui Don

  [Family member at funeral] (Ep. 8)

  Guest Role
• 
  Kim Bum Suk

  Pi Cheon U (Ep. 9)

  Guest Role
• 
  Heo Na Kyung

  [Nurse] (Ep. 9)

  Guest Role
• 
  Yoo Sung Yeol

  [Reporter] (Ep. 9)

  Guest Role
• 
  Jang Myoung Un

  [Police officer] (Ep. 9)

  Guest Role
• 
  Ok Joo Ri

  [Ji Yeong's landlord] (Ep. 9)

  Guest Role
• 
  Kim Young Moo

  Sin Gi Jeong (Ep. 9-10)

  Guest Role
• 
  Jang Kyug Su

  Ham Deok Su (Ep. 9-10)

  Guest Role
• 
  Do Yeon Jin

  Son Ji Yeong [Survivor of the serial blade killer] (Ep. 9-10)

  Guest Role
• 
  Baek Seung Chul

  Do Gi Tae (Ep. 9-11)

  Guest Role
• 
  Cha Geon Woo

  [Ji Yeong's father] (Ep. 10)

  Guest Role
• 
  Kim Young

  [NFS video engineer] (Ep. 10)

  Guest Role
• 
  Lee Su Hyung

  [NFS staff] (Ep. 11)

  Guest Role
• 
  Ri Min

  Ji Su Cheol [Young] (Ep. 12)

  Guest Role
• 
  Jang Ha Eun

  [Victim]

  Guest Role
• 
  Han Sang Jo

  [Detective]

  Guest Role
• 
  Yoo Young Chae

  [Detective]

  Guest Role
• 
  Ha Young Jin

  [Police officer]

  Guest Role
• 
  Lee Jang Ho

  [Prison guard]

  Guest Role
• 
  Yang Ha Yoon

  [Anchorwoman]

  Guest Role
• 
  Lim Yoon Bi

  [Cancer patient]

  Guest Role
• 
  Lee So Yeong

  [Fact Check staff]

  Guest Role
• 
  Jung Hwan Guest Role
• 
  Yoo In Sun

  [Bodyguard] (Ep. 2)

  Guest Role

Unknown

• 
  Ae Joo Unknown
• 
  Cho Seung Gu Unknown
• 
  Lee Jung Hoon Unknown
• 
  Jo Yeong Jae Unknown