Forensic Heroes Season 4 (2020)

Producer

• 
  Mui Siu Ching

Main Role

• 
  Raymond Wong

  Ko On / Ko Sir

  Main Role
• 
  Selena Lee

  Man Ka Hei / Ka Hei / Yi Siu Jie / Dr. Man

  Main Role
• 
  Shaun Tam

  Kwok Fai Wong / Kwok Sir / Kwok Wong / King Sir

  Main Role
• 
  Alice Chan

  Sui Wai Ming / Queen Jie / "Queen"

  Main Role
• 
  Rebecca Zhu

  Ko Ching / A Ching / Madam Ko / "Madam"

  Main Role

Support Role

• 
  Roxanne Tong

  Tsui Yi / "Chris"

  Support Role
• 
  Frederick Cheng

  Charm Ting [Queen's own assistant]

  Support Role
• 
  Yumiko Cheng

  Hau Min Li / "Monique" [Ko Sir's old girlfriend]

  Support Role
• 
  Kelly Cheung

  Ma Oi Mei / Ko Sin / "Emma" {Ko Ching's elder sister}

  Support Role
• 
  Gabriel Harrison

  Sze Kin Chin / "Stan" {Dr Man's boyfriend}

  Support Role
• 
  Sharon Chan

  Nam Ka Mei / "Sammy" | Kelly Nam (Ep. 25-30)

  Support Role
• 
  Akina Hong

  Cheung Chi Ning / "Elaine"

  Support Role
• 
  Timothy Cheng

  Ho Lap Wai / "Louis"

  Support Role
• 
  Arnold Kwok

  Yu Wai Ding / Ding Siu

  Support Role
• 
  Wiyona Yeung

  Tong Sam Yuet / Tong Sam

  Support Role
• 
  Cheung Sze Yan

  Polly

  Support Role
• 
  Carisa Yan

  Hui Yuek Tung

  Support Role
• 
  Kiwi Yuen

  Kwok Kam Bik / Bik Jie

  Support Role
• 
  Joan Lee

  Man Ka Kei / Dai Siu Jie

  Support Role
• 
  Terrence Huang

  Howard

  Support Role
• 
  Doris Chow Support Role
• 
  Yeung Shui Lun Support Role
• 
  Man Yeung Support Role
• 
  Janice Pang Support Role
• 
  Zhu Hui Lin Support Role
• 
  Kitterick Yiu Support Role
• 
  Lawrence Lau Support Role
• 
  Dickson Wong Support Role
• 
  Rachel Ching

  Susan

  Support Role
• 
  Billy Cheung Support Role

Guest Role

• 
  Martin Tong

  [Police officer] (Ep. 10)

  Guest Role
• 
  Au Hin Wai

  [Director]

  Guest Role
• 
  Miumiu Au

  Ting Siu Jing (Ep. 1)

  Guest Role
• 
  Patrick Tse

  Long Siu Tien [Ying Suet's master] (Ep. 1-2, 4)

  Guest Role
• 
  Michelle Yim

  Long Ying Suet [Siu Tien's apprentice] (Ep. 1-4)

  Guest Role
• 
  Rosanne Lui

  Ching Kwai Yau (Ep. 1-4)

  Guest Role
• 
  Pinky Cheung

  Cheung Suek Man [Ying Suet's assistant] (Ep. 1-4)

  Guest Role
• 
  Keith Mok

  Martin (Ep. 3, 8-10)

  Guest Role
• 
  Erica Chan

  [Granddaughter] (Ep. 4)

  Guest Role
• 
  Burmie Wong

  [Boy Mother] (Ep 4-5)

  Guest Role
• 
  Bob Cheung

  Chan Sam [Oi Lam's old boyfriend] (Ep. 4-8)

  Guest Role
• 
  Sharon Luk

  Yan Hung / "Scarlett" (Ep. 4-8)

  Guest Role
• 
  Stephen Wong

  Ho Chi Yiu / "Kelvin" [Yan Hung's husband] (Ep. 4-8)

  Guest Role
• 
  Stefan Wong

  Ho Chiu Hiu / "Kelvin" [Yan Hung's husband] (Ep. 4-8)

  Guest Role
• 
  Alan Wan

  Chu Hoi Chun [Chan Sam's former boss and good brother] (Ep. 4-8)

  Guest Role
• 
  MoMo Wu

  Lee Oi Lam [Chan Sam's old girlfriend] (Ep. 8)

  Guest Role
• 
  Bond Chan

  Lai Chun Yu (Ep. 9-10)

  Guest Role
• 
  Alice Fung

  Wong Po Po (Ep. 11)

  Guest Role
• 
  Antonio Ng

  (Ep. 11)

  Guest Role
• 
  Yeung Chiu Hoi

  Chau Hau (Ep. 11-14)

  Guest Role
• 
  Jerry Koo

  Tam Yee Kiu (Ep. 11-14)

  Guest Role
• 
  Eva Lai

  Chiu Choi Lan (Ep. 11-14)

  Guest Role
• 
  Choi Kwok Hing

  Lou Lai (Ep. 12)

  Guest Role
• 
  Sandy Leung

  (Ep. 12)

  Guest Role
• 
  Otto Chan

  Liang Yi Han [Bomb fanatic] (Ep. 15-18)

  Guest Role
• 
  Lam King Kong

  Wong Long Luk (Ep. 15-18)

  Guest Role
• 
  Carlo Ng

  Lou Hau Tat (Ep. 15-18)

  Guest Role
• 
  Osanna Chiu

  Ching To (Ep. 15-18)

  Guest Role
• 
  Brian Chu

  Poon Man Leung (Ep. 15-18)

  Guest Role
• 
  Christine Chu

  Manager Lui (Ep. 16)

  Guest Role
• 
  Nina Paw

  So Fong [Ko Sin's mother] (Ep. 17)

  Guest Role
• 
  Cecilia So

  Dai Mei Yee (Ep. 19-21)

  Guest Role
• 
  Strawberry Yeung

  Poon Cheuk Fei (Ep. 23-24)

  Guest Role
• 
  Savio Tsang

  Koo Wing Kin (Ep. 23-24)

  Guest Role
• 
  Mak Ling Ling

  Mak Hau Zheung (Ep. 24)

  Guest Role
• 
  Rose Chan

  [Model] (Ep. 25-30)

  Guest Role
• 
  Jonathan Cheung

  Michael Ma (Ep. 25-30)

  Guest Role
• 
  Helena Law

  Chiu Suk Koon (Ep. 25-30)

  Guest Role
• 
  Susan Tse

  Lee Chau / A Chau / Chau Che (Ep. 25-30)

  Guest Role
• 
  Marine Lee

  Law Ching Sau (Ep. 25-30)

  Guest Role
• 
  Jess Sum

  Yu Ka Bou / "Eva" (Ep. 25-30)

  Guest Role
• 
  Carman Kwan

  (Ep. 28)

  Guest Role
• 
  Odilia Chan

  (Ep. 28)

  Guest Role
• 
  Eric Chung

  [Pharmacy owner] (Ep. 30)

  Guest Role
• 
  Terence Siu

  (Ep. 30)

  Guest Role
• 
  Keefe Ng

  Chak Ka Hin / Dai Wing Yan

  Guest Role
• 
  Alex Yung

  Kwok Fai Wong [Baby]

  Guest Role
• 
  Deborah Poon

  Daisy

  Guest Role
• 
  Wu Fei

  Super

  Guest Role
• 
  Fred Cheung

  Ivan

  Guest Role
• 
  Janice Ting

  [CID]

  Guest Role
• 
  Danny Lo Guest Role
• 
  Felix Ng Guest Role
• 
  Nicole Leung Guest Role
• 
  Tony Chui Guest Role
• 
  Siu Lai Man Guest Role
• 
  Wong Wai Tong Guest Role
• 
  Helen Seng Guest Role
• 
  Georgina Chan Guest Role
• 
  Tse Ho Yat Guest Role
• 
  Lucas Yiu Guest Role
• 
  Elizabeth Nicole Wu

  Lo Haau Ying (Ep. 15-18)

  Guest Role
• 
  Terence Tung Guest Role
• 
  Alan Tam Guest Role

Unknown

• 
  Andy Wong Unknown
• 
  Cherry Cheung Unknown
• 
  Sophie Yip Unknown
• 
  Helen Ng Unknown
• 
  Bert Mok Unknown
• 
  Jan Tse Unknown
• 
  Fanny Lee Unknown
• 
  Kinlas Chan Unknown
• 
  Andy Lin Unknown
• 
  Joey Miu Unknown
• 
  Sophia Lam Unknown