Detective Investigation Files Season 4

Director

• 
  Poon Ka Tak
• 
  Lam Chi Wah

Main Role

• 
  Charmaine Sheh

  Man Yuen Lan

  Main Role
• 
  Louis Koo

  Tsui Fei

  Main Role
• 
  Sunny Chan

  Kong Tze San

  Main Role
• 
  Jessica Hsuan

  Mo Chiu Kwan / “Queen”

  Main Role

Support Role

• 
  Catherine Chau

  Wong Kei Kei

  Support Role
• 
  Law Lok Lam

  Mon Kwok Tai

  Support Role
• 
  Anne Heung

  Leung Chin Chin

  Support Role
• 
  Maggie Shiu

  Kong Tze Ching / Kong Tze Yiu

  Support Role
• 
  Eileen Yeow

  Chi Lam / Gigi

  Support Role
• 
  Felix Lok

  Mo Yuen Keung

  Support Role
• 
  Samuel Kwok

  Leung Kim Hung

  Support Role
• 
  Timothy Cheng

  Lau Gin Sang

  Support Role
• 
  Gordon Liu

  Lok Chan Biu

  Support Role
• 
  Li Lung Kay Support Role
• 
  Chan On Ying Support Role
• 
  Lee Shing Cheong Support Role
• 
  Wong Wai Support Role
• 
  Choi Kwok Hing

  Lin Jian

  Support Role
• 
  English Tang Support Role
• 
  Bruce Li Support Role
• 
  Michelle Fung Support Role
• 
  Yu Mo Lin Support Role
• 
  Lam King Kong Support Role
• 
  Ling Hon Support Role
• 
  Albert Law Support Role
• 
  Leo Tsang Support Role
• 
  Yu Chi Ming Support Role
• 
  Cecilia So Support Role
• 
  Kitty Lau

  Mrs. Chow

  Support Role
• 
  Lau Kong Support Role
• 
  Jason Lam Support Role
• 
  Russell Cheung Support Role
• 
  Henry Lo Support Role
• 
  June Chan Support Role
• 
  Andy Dai Support Role
• 
  Eddie Li Support Role
• 
  Irene Wong

  Li Bao Ping

  Support Role
• 
  Chan Wing Chun Support Role
• 
  Lo Meng Support Role
• 
  Wong Man Piu Support Role
• 
  Peter Pang

  Lin Hao Guang

  Support Role
• 
  Rainbow Ching Support Role
• 
  Willie Wai Support Role
• 
  Sunny Dia Support Role
• 
  Law Kwok Wai Support Role
• 
  Sugar Yau Support Role
• 
  Sammy Lau Support Role
• 
  Chiu Hung Support Role
• 
  Samuel Yau

  Jung Ji Leung

  Support Role
• 
  Martin Tong Support Role
• 
  Sam Leung Support Role
• 
  Cheung Ying Choi Support Role
• 
  Tang Yu Chiu Support Role
• 
  Wan Yeung Ming Support Role
• 
  Man Kit Wan Support Role
• 
  Mak Chi Wan Support Role
• 
  Samson Yeung Support Role
• 
  Leung Biu Ching Support Role
• 
  Esther Wan Support Role
• 
  Lau Mei Shan Support Role
• 
  Kam Hing Yin Support Role
• 
  Kwok Tak San Support Role
• 
  John Tang Support Role
• 
  Candy Chiu Support Role
• 
  Simon Lo Support Role
• 
  Elton Loo Support Role
• 
  Celine Ma

  Helen

  Support Role
• 
  Ip Chun Sing Support Role
• 
  Cheung Hak Support Role
• 
  Helena Law Support Role
• 
  Edward Mok

  Fung Tim Hoi

  Support Role
• 
  Fiona Yuen

  Yuen Mei Mei

  Support Role

Guest Role

• 
  Marco Ngai

  Wong Wai Lun / "Alan"

  Guest Role
• 
  Kenny Wong

  Chan Si Hong

  Guest Role
• 
  Eddie Cheung

  Lok Wai Gei

  Guest Role
• 
  Florence Kwok

  Tin Si Si

  Guest Role
• 
  Tavia Yeung

  Irene

  Guest Role
• 
  Roger Kwok

  Cheng Tung Sing

  Guest Role
• 
  Michael Tse

  Lau Sai Cheung

  Guest Role
• 
  Joe Ma

  Sung Ka Chai / Alex

  Guest Role
• 
  Joyce Tang

  Wan Chau Yuet

  Guest Role
• 
  Melissa Ng

  Chow Yeuk Mui / Lam Wing Heng

  Guest Role
• 
  Derek Kok

  Lam Ho Tin

  Guest Role
• 
  Kingdom Yuen

  Chau Hang Ngo / Michelle

  Guest Role
• 
  Gregory Charles Rivers

  Frankie Fan

  Guest Role

Unknown

• 
  Jenny Wong Unknown