The Defected

Main Role

• 
  Benjamin Yuen

  Seung Sing / Sing Sir

  Main Role
• 
  Kara Wai

  Man Hei Wa / Madam Man

  Main Role
• 
  Philip Keung

  Yau Bin Ko / "Bingo"

  Main Role
• 
  Ben Wong

  Cheng Yu Sam / "Samuel"

  Main Role

Support Role

• 
  Mat Yeung

  Yau Lai Kit / A Kit / Matt Sir / "Matt" [Senior Inspector of Narcotics Bureau / Senior Inspector of Crime Squad of West Kowloon Region]

  Support Role
• 
  Oscar Leung

  Gok Wing Cheng

  Support Role
• 
  Berg Ng

  Ding Ming Yeung / "Dominic"

  Support Role
• 
  Sisley Choi

  Chiu Hei Yuet / "Jill"

  Support Role
• 
  Benz Hui

  Kan Kwok Cui / A Kan / Kan Sir / Gin Kan / "Kan"

  Support Role
• 
  Grace Wong

  Yeung Hiu Yi / Yi Jie

  Support Role
• 
  Otto Chan

  Wu Wei Zhong / A Chung / Ng Sir / Wu Gung Gung

  Support Role
• 
  Gloria Tang

  Kwong Wing Sa / "Kay"[Madam Man's own assistant]

  Support Role
• 
  Joman Chiang

  Luk Wai Kiu / "Iris"

  Support Role
• 
  Angelina Lo

  Cheung Lai Han

  Support Role
• 
  Dickson Yu

  Mok Sai Chui

  Support Role
• 
  Brian Tse

  Chan Kwok Sing / A Sing [Sing Sir's assistant]

  Support Role
• 
  Bill Chan

  Kwok Chin Leung / Yat Gor / Kwok Sir / Dai Sir / "Vincent"

  Support Role
• 
  Shally Tsang

  Lui Bik Zi / Madam Lui

  Support Role
• 
  Geoffrey Wong

  Tong Zi Hou / "Hanson"

  Support Role
• 
  Ken Law

  Eddy

  Support Role
• 
  Lam Lei

  Lo Dai Wai

  Support Role
• 
  Marine Lee

  Yuen Man Wah / A Wah

  Support Role
• 
  Yeung Chiu Hoi

  Kong Zing Lung / Lung Ko

  Support Role
• 
  Milkson Fong

  Fa Wen

  Support Role
• 
  Au Hin Wai

  Government Official Haau

  Support Role
• 
  Cheung Sze Yan Support Role
• 
  Erica Chan Support Role
• 
  Lawrence Lau Support Role
• 
  Julian Gaertner Support Role
• 
  Mandy Ho Support Role
• 
  Akai Lee Support Role
• 
  Yeung Shui Lun Support Role
• 
  Chiu Lok Yin Support Role
• 
  Man Yeung Support Role
• 
  Martin Tong Support Role
• 
  So Lai Ming Support Role
• 
  Jacky Lee Support Role
• 
  Simon Tang Support Role
• 
  Janice Pang Support Role
• 
  Felix Ng Support Role
• 
  Calvin Chan Support Role
• 
  Aurora Li Support Role
• 
  Burmie Wong Support Role
• 
  Terence Tung Support Role
• 
  Kitterick Yiu Support Role
• 
  William Chu Support Role

Guest Role

• 
  Sharon Chan

  So Wai Nga / "Carrie" [Samuel's wife]

  Guest Role
• 
  Amisha Ng

  [David's helper] (Ep. 1, 29-30)

  Guest Role
• 
  Elizabeth Nicole Wu

  [Shipping company staff] (Ep. 3)

  Guest Role
• 
  Marcus Kwok

  Dr. Ho (Ep. 5)

  Guest Role
• 
  Sandy Leung

  [CID] (Ep. 9, 15, 17, 29-30)

  Guest Role
• 
  Lo Jun Fung

  [Principal public prosecutor of the high court] (Ep. 17)

  Guest Role
• 
  Wu Fei

  (Ep. 28, 30)

  Guest Role
• 
  Priscilla Wong

  Janice

  Guest Role
• 
  Lee Shing Cheong

  Wan Tin Yu / Wan Sir

  Guest Role
• 
  Cheung Kwok Keung

  "TK"

  Guest Role
• 
  Janice Shum

  Li Mae Mei

  Guest Role
• 
  Tony Hung

  Yau Lai Chun / Yau Sir

  Guest Role
• 
  Constance Kong

  Chiu Hei Yuet [Young]

  Guest Role
• 
  Louis Szeto Guest Role
• 
  Mary Hon Guest Role
• 
  Thomas Ng Guest Role
• 
  Vincent Lam Guest Role
• 
  Cheng Ka Sang Guest Role
• 
  Tse Ho Yat Guest Role

Unknown

• 
  Terrence Huang Unknown
• 
  Bert Mok Unknown
• 
  Edsel Chiu Unknown
• 
  Andy Wong Unknown
• 
  Bowie Cheung Unknown
• 
  Jenny Wong Unknown
• 
  Oman Lam Unknown
• 
  Deborah Poon Unknown
• 
  Keith Mok Unknown
• 
  Leo Kwan Unknown
• 
  Ball Mang Unknown