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 Mo

  Main Role
• 
  Charmaine Sheh

  Man Yuen Lan

  Main Role
• 
  Lee San San

  Tong Sam Yu

  Main Role

Support Role

• 
  Edmond So

  Hon Kwok Yan [CID]

  Support Role
• 
  Samuel Kwok

  Leung Kim Hung [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
• 
  Edward Mok

  Fung Tim Hoi [CID]

  Support Role
• 
  Rebecca Chan

  Lau Lin Heung [Chiu Kwan's aunt]

  Support Role
• 
  Felix Lok

  Mo Yuen Keung [Chiu Kwan's father]

  Support Role
• 
  John Tang

  Ah Kit [Chiu Kwan's half-brother]

  Support Role
• 
  Maggie Shiu

  Kong Tze Ching | Kong Tze Yiu [Tze San's sister]

  Support Role
• 
  Suet Nei

  Tang Fong [Tze San's aunt]

  Support Role
• 
  Lee Shing Cheong

  Chow Siu Kun [Tze Ching's husband]

  Support Role
• 
  Ching Siu Lung

  [Tze San's uncle]

  Support Role
• 
  Law Lok Lam

  Man Kwok Tai [Yuen Lan's father]

  Support Role
• 
  Anne Heung

  Leung Chin Chin [Tsui Fei's missing girlfriend]

  Support Role
• 
  Timothy Cheng

  Lau Kin Sang / Victor [Eye doctor]

  Support Role
• 
  Willie Wai

  Wan Chi Sam / Sam

  Support Role
• 
  Cecilia So

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

  Support Role
• 
  Jason Lam

  [Police officer]

  Support Role
• 
  Po Ming Nam

  [Police officer]

  Support Role
• 
  Cho Chun

  Joe / Mrs. Yau [Pei Tak's wife]

  Support Role
• 
  Pal Sinn

  Chui Yi Chi [Chez Maman's wine expert]

  Support Role
• 
  Gregory Charles Rivers

  Frankie Fan [Chez Maman head chef]

  Support Role
• 
  English Tang

  Chu Ka Chuen [Chez Maman manager]

  Support Role
• 
  Ng Wai Shan

  Mary Ma [Yuen Lan's co-worker]

  Support Role
• 
  Shally Tsang

  [Yuen Lan's co-worker]

  Support Role

Guest Role

• 
  Suen Kwai Hing

  Mr. Chung [Security guard] (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
• 
  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
• 
  Johnny Wong

  Dr. Wong [Forensic medical examiner] (Ep. 1) | [Guest] (Ep. 24)

  Guest Role
• 
  Kam Chi Ching

  [Supermarket staff] (Ep. 1) | [Forensic team] (Ep. 23) | [Doctor] (Ep. 35)

  Guest Role
• 
  Vincent Cheung

  [Doctor] (Ep. 1, 3, 29, 35)

  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, 26)

  Guest Role
• 
  Ricky Wong

  Yin [CID] (Ep. 3)

  Guest Role
• 
  Tony Kwong

  [Tsui Fei's superior] (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
• 
  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
• 
  Mark Kwok

  Fok Wai Chong / "Ah Chong" (Ep. 7-8, 13-15)

  Guest Role
• 
  Yu Chi Ming

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

  Guest Role
• 
  Chiu Shek Man

  [Judge] (Ep. 7, 40) | [Priest] (Ep. 40)

  Guest Role
• 
  Kong Hon

  Fok Wan Chung [Wai Chong's father] (Ep. 7-8, 15, 46)

  Guest Role
• 
  Tam Yat Ching

  Szeto Ping [Po Lee's cousin] (Ep. 7-8, 13, 14 - voice only, 15, 46)

  Guest Role
• 
  Lau Mei Shan

  [Police officer] (Ep. 9-10)

  Guest Role
• 
  Esther Wan

  Amy [Kwok Tai's secretary] (Ep. 9, 23)

  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
• 
  Yu Mo Lin

  "Sister Kam" [Man family housekeeper] (Ep. 10, 16, 18, 24)

  Guest Role
• 
  Man Kit Wan

  Wang Suk Wai [Yuen Lan's mother] (Ep. 10, 24-25)

  Guest Role
• 
  So Lai Ming

  [Police officer] (Ep. 10, 13, 16, 34-35, 38)

  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
• 
  Stephen Ho

  [Bik Nei's brother] (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
• 
  David Do

  David [Chez Maman waiter] (Ep. 13, 16, 29-31, 34)

  Guest Role
• 
  Henry Lo

  Dr. Tsang Yin Hang [Chiu Kwan's superior] (Ep. 14, 22, 29-30)

  Guest Role
• 
  Kam Hing Yin

  Lok Kin Yip (Ep. 16, 23-25)

  Guest Role
• 
  Russell Cheung

  Russell [Chez Maman waiter] (Ep. 16, 29-31, 34, 45)

  Guest Role
• 
  Forest Chan

  Mr. Chan [Sap Ng's son] (Ep. 17)

  Guest Role
• 
  Simon Lo

  Ma Lik (Ep. 17-19)

  Guest Role
• 
  Helena Law

  Chan Sap Ng (Ep. 17-19)

  Guest Role
• 
  Emotion Cheung

  Mok Lai Shun [Photographer] (Ep. 17-19)

  Guest Role
• 
  Akina Hong

  Sam Lai Mei [Nurse] (Ep. 17-19)

  Guest Role
• 
  Choi Kwok Hing

  Lam Kim (Ep. 17-20)

  Guest Role
• 
  Timmy Hung

  Hung Chi To (Ep. 17-20)

  Guest Role
• 
  Mary Hon

  Yip Chui Ho [Bar owner] (Ep. 17-20)

  Guest Role
• 
  Lau Kong

  Hung Chin Pang [Chi To's father] (Ep. 17-20)

  Guest Role
• 
  Chiu Hung

  Chin Yat On (Ep. 17, 19 - voice only, 20)

  Guest Role
• 
  Ricky Lee

  [Hotel manager] (Ep. 18)

  Guest Role
• 
  Leo Tsang

  [Private detective] (Ep. 18) | [Guest] (Ep. 24)

  Guest Role
• 
  Ling Lai Man

  Ah Wing [Ka Wai's husband] (Ep. 19)

  Guest Role
• 
  Chan Wing Chun

  Cho Chim (Ep. 20, 44-45)

  Guest Role
• 
  Martin Tong

  Ah Tong [Man attempting suicide] (Ep. 21)

  Guest Role
• 
  Joe Ma

  Sung Ka Chai / Alex (Ep. 21, 28, 37, 41-43, 45-46)

  Guest Role
• 
  Sugar Yau

  Teresa (Ep. 22-23)

  Guest Role
• 
  Man Yeung

  [Canteen staff] (Ep. 22, 34)

  Guest Role
• 
  Michelle Fung

  Chung Sai Yin [Ah Kit's mother] (Ep. 26)

  Guest Role
• 
  Wong Wai Tak

  [Hotel manager] (Ep. 26-27)

  Guest Role
• 
  Samson Yeung

  Ching Pak (Ep. 26-28)

  Guest Role
• 
  Irene Wong

  Lee Po Ping (Ep. 26-27, 29)

  Guest Role
• 
  Ip Chun Sing

  [Store owner] (Ep. 27)

  Guest Role
• 
  Eddie Ho

  [Man at beach] (Ep. 27)

  Guest Role
• 
  Yoe Biu

  [Hotel manager] (Ep. 27-28)

  Guest Role
• 
  Wong Fung King

  Nancy [Nightclub hostess] (Ep. 28)

  Guest Role
• 
  Wong Man Piu

  Ma Kwok Chu [Kwok Chung's cousin] (Ep. 29)

  Guest Role
• 
  Wong Wai Leung

  [Chez Maman sous chef] (Ep. 29-32)

  Guest Role
• 
  Eddie Cheung

  Lok Wai Kei [Chez Maman executive manager] (Ep. 29-33)

  Guest Role
• 
  Tavia Yeung

  Irene (Ep. 29, 33) | [Reporter] (Ep. 38)

  Guest Role
• 
  Raymond Chiu

  [Chez Maman chef] (Ep. 30)

  Guest Role
• 
  Lee Hoi Sang

  [Orchard owner] (Ep. 30)

  Guest Role
• 
  Chan On Ying

  Lam Lok Ha [Chez Maman waiter] (Ep. 30-33)

  Guest Role
• 
  Mak Chi Wan

  [Hotel manager] (Ep. 34)

  Guest Role
• 
  Kenny Wong

  Chan Si Hong (Ep. 34-35)

  Guest Role
• 
  Li Lung Kay

  Chung Wing Choi (Ep. 34, 36)

  Guest Role
• 
  Cheng Ka Sang

  [Wing Choi's debt collector] (Ep. 34, 36)

  Guest Role
• 
  Daniel Kwok

  [Ho TIn's employee] (Ep. 34-36)

  Guest Role
• 
  June Chan

  Lee Sau Yi (Ep. 34-36)

  Guest Role
• 
  Derek Kok

  Lam Ho Tin (Ep. 34-36)

  Guest Role
• 
  Peter Pang

  Lam Ho Kwang [Ho Tin's cousin] (Ep. 34-36)

  Guest Role
• 
  Kingdom Yuen

  Chow Hung Ngo / Michelle [Frankie's wife] (Ep. 34-36)

  Guest Role
• 
  May Kwong

  Wah Po Ching [Singer] (Ep. 37-39)

  Guest Role
• 
  Hilary Tsui

  Cheung Hiu Tung (Ep. 37-40)

  Guest Role
• 
  Marco Ngai

  Wong Wai Lun / Alan [Sze Sze's bodyguard] (Ep. 37-40)

  Guest Role
• 
  Florence Kwok

  Tin Sze Sze [Actress] (Ep. 37-41)

  Guest Role
• 
  Ken Lok

  Cheung Pak Ho [Hiu Tung's brother] (Ep. 37-38, 40, 42, 46, 48)

  Guest Role
• 
  Hui Sze Man

  Mrs. Chan (Ep. 38)

  Guest Role
• 
  Elton Loo

  Ho Fei Lap / Philip Ho [Po Ching's agent] (Ep. 38)

  Guest Role
• 
  Bobo Hoi

  "Granny Sam" (Ep. 40)

  Guest Role
• 
  Cheung Ying Choi

  Dr. Man (Ep. 44)

  Guest Role
• 
  Albert Law

  Kong Fung Nin [Tze San's father] (Ep. 44)

  Guest Role
• 
  Helen Ma

  "Ah Ting" [Fung Nin's mistress] (Ep. 44)

  Guest Role
• 
  Mak Ka Lun

  [Emergency doctor] (Ep. 46, 48)

  Guest Role
• 
  Gordon Liu

  Lok Chan Biu (Ep. 47-49)

  Guest Role
• 
  Roger Kwok

  Cheng Tung Sing (Ep. 47-50)

  Guest Role
• 
  Olivia Fu

  Cheung Siu Choi

  Guest Role