Detective Investigation Files Season 4

Director

• 
  Poon Ka Tak
• 
  Lam Chi Wah

Main Role

• 
  Louis Koo

  Tsui Fei

  Main Role
• 
  Sunny Chan

  Kong Tze San

  Main Role
• 
  Jessica Hsuan

  Mo Chiu Kwan / “Quin”

  Main Role
• 
  Charmaine Sheh

  Man Yuen Lan

  Main Role

Support Role

• 
  Samuel Kwok

  Leung Kim Hung [CID]

  Support Role
• 
  Edmond So

  Hon Kwok Yan [CID]

  Support Role
• 
  Eileen Yeow

  Siu Chi Lam / Gigi [CID]

  Support Role
• 
  Andy Dai

  Yau Pei Tak / Peter [Chief inspector]

  Support Role
• 
  Catherine Chau

  Wong Kei Kei [CID]

  Support Role
• 
  Timothy Cheng

  Lau Kin Sang [Eye doctor]

  Support Role
• 
  Rebecca Chan

  Lau Lin Heung [Chiu Kwan's aunt]

  Support Role
• 
  Law Lok Lam

  Man Kwok Tai [Yuen Lan's father]

  Support Role
• 
  Mark Kwok

  Fok Wai Chong / "Ah Chong"

  Support Role
• 
  Felix Lok

  Mo Yuen Keung [Chiu Kwan's father]

  Support Role
• 
  Cecilia So

  So Wai Si / Sophia So [Yuen Lan's boss]

  Support Role
• 
  Ng Wai Shan

  Mary Ma [Yuen Lan's co-worker]

  Support Role
• 
  Shally Tsang

  [Yuen Lan's co-worker]

  Support Role
• 
  Willie Wai

  Wan Chi Sam

  Support Role
• 
  John Tang

  [Chiu Kwan's brother]

  Support Role
• 
  Jason Lam

  [Police officer]

  Support Role

Guest Role

• 
  Kam Chi Ching

  [Supermarket staff] (Ep. 1)

  Guest Role
• 
  Suen Kwai Hing

  Mr. Chung [Security guard] (Ep. 1)

  Guest Role
• 
  Johnny Wong

  Dr. Wong [Forensic medical examiner] (Ep. 1)

  Guest Role
• 
  Law Kwok Wai

  [Ellen's father] (Ep. 1-2)

  Guest Role
• 
  Leung Biu Ching

  [Ellen's mother] (Ep. 1-2)

  Guest Role
• 
  Cheung Hak

  [Ellen's brother] (Ep. 1-2)

  Guest Role
• 
  Vincent Cheung

  [Doctor] (Ep. 1, 3)

  Guest Role
• 
  Celine Ma

  Man On Yi / Helen [Reporter] (Ep. 1, 3)

  Guest Role
• 
  Lo Meng

  Ho Kam Wing [Security guard] (Ep. 1-3)

  Guest Role
• 
  Michael Tse

  Lau Sai Cheong [Doctor] (Ep. 1-3)

  Guest Role
• 
  Po Ming Nam

  [Police officer] (Ep. 1-2, 11)

  Guest Role
• 
  Kitty Lau

  Mrs. Chow (Ep. 2)

  Guest Role
• 
  Andy Sui

  Sergeant Yeung (Ep. 2)

  Guest Role
• 
  Bruce Li

  Mr. Tam [Victim's husband] (Ep. 2)

  Guest Role
• 
  Chan Min Leung

  [Motel security guard] (Ep. 2)

  Guest Role
• 
  Kwok Tak San

  Dr. W. K. Chung (Ep. 2)

  Guest Role
• 
  Sunny Dia

  Bak Wai Ming [Doctor] (Ep. 2)

  Guest Role
• 
  Ricky Wong

  Yin [CID] (Ep. 3)

  Guest Role
• 
  Tony Kwong

  [Tsui Fei's superior] (Ep. 4)

  Guest Role
• 
  Anne Heung

  Leung Chin Chin [Tsui Fei's girlfriend] (Ep. 4)

  Guest Role
• 
  Fiona Yuen

  Yuen Mei Mei [Tsui Fei's cousin] (Ep. 4-5)

  Guest Role
• 
  Wan Yeung Ming

  To Tze Ming (Ep. 4-6)

  Guest Role
• 
  Koey Leung

  Man Sai / Ah Wing (Ep. 4-6)

  Guest Role
• 
  Melissa Ng

  Chow Yeuk Mui [Tze Ming's wife] (Ep. 4-6)

  Guest Role
• 
  Ngai Wai Man

  [Photographer] (Ep. 5)

  Guest Role
• 
  Ling Hon

  [Security guard] (Ep. 5)

  Guest Role
• 
  Eddie Li

  Ku Wang (Ep. 5-6)

  Guest Role
• 
  Joseph Lee

  Chiu Hon Wa [Mei Mei's husband] (Ep. 5-6)

  Guest Role
• 
  Chiu Shek Man

  [Judge] (Ep. 7)

  Guest Role
• 
  Lily Liu

  [Tang family housekeeper] (Ep. 7-8)

  Guest Role
• 
  Rainbow Ching

  Yan Po Lee [Sam Yu's mother] (Ep. 7-8)

  Guest Role
• 
  Sammy Lau

  Tse Yiu Kai / "Ah Kai" (Ep. 7-9)

  Guest Role
• 
  Tang Yu Chiu

  Chan Wing Pong [Private investigator] (Ep. 7-9)

  Guest Role
• 
  Wong Wai

  Tse Hoi Chiu / Attorney Tse [Ah Kai's father] (Ep. 7-9)

  Guest Role
• 
  Kong Hon

  Fok Wan Chung [Wai Chong's father] (Ep. 7-8, 15)

  Guest Role
• 
  Yu Chi Ming

  Wan Mong Shek [Po Lee's cousin] (Ep. 7-8, 13, 14 - voice only, 15)

  Guest Role
• 
  Tam Yat Ching

  Szeto Ping [Po Lee's cousin] (Ep. 7-8, 13, 14 - voice only, 15)

  Guest Role
• 
  Esther Wan

  Amy [Kwok Tai's secretary] (Ep. 9)

  Guest Role
• 
  Lau Mei Shan

  [Police officer] (Ep. 9-10)

  Guest Role
• 
  Yu Mo Lin

  "Sister Kam" [Man family housekeeper] (Ep. 10)

  Guest Role
• 
  Man Kit Wan

  Wang Suk Wai [Yuen Lan's mother] (Ep. 10)

  Guest Role
• 
  Helen Poon

  Lin Ying Suet (Ep. 10-12)

  Guest Role
• 
  Cherie Chan

  Chung Ying [Ying Suet's daughter] (Ep. 10-12)

  Guest Role
• 
  Samuel Yau

  Chung Chi Leung [Ying Suet's husband] (Ep. 10-12)

  Guest Role
• 
  So Lai Ming

  [Police officer] (Ep. 10, 13)

  Guest Role
• 
  Suet Nei

  Tang Fong [Tze San's aunt] (Ep. 10, 13)

  Guest Role
• 
  Lam King Kong

  Chow Man Sing [Chung Ying's girlfriend] (Ep. 11)

  Guest Role
• 
  Jerry Koo

  [Kwok Yan's brother] (Ep. 12)

  Guest Role
• 
  Pal Sinn

  [Wine expert] (Ep. 13)

  Guest Role
• 
  Stephen Ho

  [Bik Nei's brother] (Ep. 13)

  Guest Role
• 
  David Do

  [Restaurant waiter] (Ep. 13)

  Guest Role
• 
  English Tang

  [Restaurant manager] (Ep. 13)

  Guest Role
• 
  Sam Leung

  Cheng Wai Lim (Ep. 13-14)

  Guest Role
• 
  Candy Chiu

  Suen Bik Nei [Mong Shek's wife] (Ep. 13, 15)

  Guest Role
• 
  Joyce Tang

  Wan Chau Yuet [Mong Shek's niece] (Ep. 13-15)

  Guest Role
• 
  Tavia Yeung

  Irene

  Guest Role
• 
  Florence Kwok

  Tin Si Si

  Guest Role
• 
  Choi Kwok Hing

  Lin Jian

  Guest Role
• 
  Derek Kok

  Lam Ho Tin

  Guest Role
• 
  Eddie Cheung

  Lok Wai Gei

  Guest Role
• 
  Gordon Liu

  Lok Chan Biu

  Guest Role
• 
  Kenny Wong

  Chan Si Hong

  Guest Role
• 
  Roger Kwok

  Cheng Tung Sing

  Guest Role
• 
  Li Lung Kay

  Chung Wing Choi

  Guest Role
• 
  Joe Ma

  Sung Ka Chai / Alex

  Guest Role
• 
  Marco Ngai

  Wong Wai Lun / Alan

  Guest Role
• 
  Kingdom Yuen

  Chau Hang Ngo / Michelle

  Guest Role
• 
  Maggie Shiu

  Kong Tze Ching / Kong Tze Yiu

  Guest Role
• 
  Chan On Ying

  Lam Lok Ha

  Guest Role
• 
  Lee Shing Cheong

  Chow Siu Kun

  Guest Role
• 
  Michelle Fung Guest Role
• 
  Albert Law Guest Role
• 
  Leo Tsang Guest Role
• 
  Lau Kong Guest Role
• 
  Russell Cheung Guest Role
• 
  Henry Lo Guest Role
• 
  June Chan Guest Role
• 
  Irene Wong

  Li Bao Ping

  Guest Role
• 
  Chan Wing Chun Guest Role
• 
  Wong Man Piu Guest Role
• 
  Peter Pang

  Lin Hao Guang

  Guest Role
• 
  Gregory Charles Rivers

  Frankie Fan

  Guest Role
• 
  Cheung Ying Choi Guest Role
• 
  Helena Law Guest Role
• 
  Jenny Wong Guest Role
• 
  Sugar Yau Guest Role
• 
  Edward Mok

  Fung Tim Hoi

  Guest Role
• 
  Elton Loo Guest Role
• 
  Mak Chi Wan Guest Role
• 
  Martin Tong Guest Role
• 
  Ip Chun Sing Guest Role
• 
  Samson Yeung Guest Role
• 
  Chiu Hung Guest Role
• 
  Simon Lo Guest Role
• 
  Kam Hing Yin Guest Role