Big White Duel

Main Role

• 
  Roger Kwok

  Yeung Yat To / Dr. Yeung / "Y.T."

  Main Role
• 
  Kenneth Ma

  Tong Ming / Dr. Tong

  Main Role
• 
  Natalie Tong

  So Yee / See Mou / So Yi Sang / Dr. So / "Zoe"

  Main Role
• 
  Ali Lee

  Ching Lok Man / Dr. Ching

  Main Role
• 
  Kelly Cheung

  Lui Oi Ning / Lui Yi Sang / Dr. Lui / "Yan"

  Main Role

Support Role

• 
  Matthew Ho

  Poon Wai Dak / Poon Yi Sang / Dak Zai / Dr. Poon / "Max" [Dr. Ching's own assistant]

  Support Role
• 
  David Chiang

  Lui Chong Hok / Lui Yuen Zheung / Dr. Lui [Yan's father]

  Support Role
• 
  Ram Chiang

  Yu Yam Tam / Yu Yi Sang / Tam Gor / Dr. Yu / A Tam / "Samuel"

  Support Role
• 
  Crystal Fung

  Fong Shu Ting / Fong Yi Sang / Dr. Fong / "Ceci" [Dr. Tong and Dr. Ching's own assistant]

  Support Role
• 
  Ashley Chu

  Hong Kiu / A Kiu / Mrs. Hong / "Eugene"

  Support Role
• 
  Stephen Wong

  Lam Hok Kei / Lam Yi Sang / Dr. Lam / "Patrick"

  Support Role
• 
  Willie Wai

  Ho Chi Gwong / Dr. Ho / "Hugo"

  Support Role
• 
  Bobo Yeung

  Ho Yin Hei / Ho Yi Sang / "Mary"

  Support Role
• 
  Marcus Kwok

  Lam Siu Leung / Lam Yi Sang / Dr. Lam / "Don"

  Support Role
• 
  MoMo Wu

  Wai Man Yee / "Macy"

  Support Role
• 
  Doris Chow

  Ma Yee Chi / Ma Yi Sang / Dr. Ma / "Paula"

  Support Role
• 
  Aurora Li

  Kiu Chi Yau / "Kate"

  Support Role
• 
  Kitterick Yiu

  Cheng Ka Wong

  Support Role
• 
  Gary Tam

  Ng Wing Wing

  Support Role
• 
  Max Cheung

  Wan Ming Cheung / Wan Chu Chig / Dr. Wan / "Martin" {Eugene's husband}

  Support Role
• 
  Timothy Cheng

  Yau Kwok Dung / Yau Fu Guk Zheung / Dr. Yau / "Ivan"

  Support Role
• 
  Marine Lee

  Au Mei May / Dr. Au / "Chris"

  Support Role
• 
  Alex Yung

  Sze To Gid / "Vincent"

  Support Role
• 
  Carisa Yan

  Luk Yi Sang

  Support Role
• 
  Kiwi Yuen

  Wah Mou

  Support Role
• 
  Eric Chung

  Dr. Lam / "Duncan"

  Support Role
• 
  Henry Yu

  Chan Kin Shing / Dr. Chan

  Support Role
• 
  Derek Wong

  Cheung Kwok Man / Dr. Cheung

  Support Role
• 
  Phoebe Chow

  Dang Choh Kiu

  Support Role
• 
  Osanna Chiu

  Jeung Sin Wong / "Jackie"

  Support Role
• 
  Nicole Wan

  [Nurse]

  Support Role
• 
  Cheung Sze Yan Support Role
• 
  Sophie Yip Support Role
• 
  Chan Min Leung Support Role
• 
  Chiu Lok Yin Support Role
• 
  Yeung Shui Lun Support Role
• 
  Akai Lee Support Role
• 
  Kong Wing Fai Support Role
• 
  Ng Shui Ting Support Role
• 
  Chun Kai Wai Support Role
• 
  Mina Kwok Support Role
• 
  Billy Cheung Support Role
• 
  Judy Tsang Support Role
• 
  Pauline Chow Support Role
• 
  Jacky Lee Support Role
• 
  Kris Lam Support Role
• 
  Rachel Ching Support Role
• 
  So Lai Ming Support Role
• 
  William Chu Support Role
• 
  Calvin Chan Support Role
• 
  Iva Law Support Role
• 
  Keefe Ng Support Role
• 
  Cecilia Fong Support Role
• 
  Burmie Wong Support Role
• 
  Athena Ng Support Role
• 
  Miguel Choi Support Role
• 
  Jones Lee Support Role
• 
  Esther Wan Support Role
• 
  Ng Pui Yu

  [Kindergarten teacher]

  Support Role

Guest Role

• 
  Elizabeth Nicole Wu

  [Ng Wing Yip's wife] (Ep. 1-2)

  Guest Role
• 
  Michael Wai

  William (Ep. 1, 11, 15, 20-21)

  Guest Role
• 
  Antonio Ng

  (Ep. 1, 18)

  Guest Role
• 
  Ball Mang

  (Ep. 2-4)

  Guest Role
• 
  Hebe Chan

  Kitty (Ep. 2, 4-5)

  Guest Role
• 
  Joe Yau

  Alan (Ep. 2, 4-5, 18)

  Guest Role
• 
  Milkson Fong

  Wong Chi Keung (Ep. 5-6)

  Guest Role
• 
  Christine Chu

  (Ep. 7)

  Guest Role
• 
  Lo Jun Fung

  Jau Siu Hong (Ep. 8)

  Guest Role
• 
  Lawrence Lau

  [Site worker] (Ep. 12)

  Guest Role
• 
  Amy Ng

  [News anchor] (Ep. 12)

  Guest Role
• 
  Frankie Choi

  (Ep. 12, 15)

  Guest Role
• 
  Virginia Lau

  [Pole dancer] (Ep. 13)

  Guest Role
• 
  Irina Tang

  (Ep. 13)

  Guest Role
• 
  Chloe Nguyen

  Sa / "Sarah" (Ep. 14)

  Guest Role
• 
  Erica Chan

  [College student] (Ep. 14)

  Guest Role
• 
  Gordon Siu

  Tin (Ep. 15)

  Guest Role
• 
  Andrea So

  Lam Tai (Ep. 18)

  Guest Role
• 
  Ricco Ng

  [University student] (Ep. 18)

  Guest Role
• 
  Kiko Leung

  (Ep. 18)

  Guest Role
• 
  Shally Tsang

  Lai (Ep. 20)

  Guest Role
• 
  Leo Kwan

  (Ep. 20)

  Guest Role
• 
  Albert Cheung

  Victor (Ep. 21)

  Guest Role
• 
  Bianca Chan

  (Ep. 23)

  Guest Role
• 
  Yao Bing

  [Dr. Ching's colleague "Doctors Without Borders"] (Ep. 25)

  Guest Role
• 
  Terence Siu

  (Ep. 25)

  Guest Role
• 
  Sky Chiu

  Tong Ming [Young]

  Guest Role
• 
  Mark Ma

  Yu Yam Tam [Young]

  Guest Role
• 
  Wu Fei

  Tse Ka Jun

  Guest Role
• 
  Janice Shum

  [Parent of a patient]

  Guest Role
• 
  Au Hin Wai

  [Director]

  Guest Role
• 
  Janice Ting

  [Medical student]

  Guest Role
• 
  Danny Lo Guest Role
• 
  Felix Ng Guest Role
• 
  Li Wai Kin Guest Role
• 
  Thomas Ng Guest Role
• 
  Simon Tang Guest Role
• 
  Helen Seng Guest Role
• 
  Dickson Wong Guest Role
• 
  Siu Lai Man Guest Role
• 
  Clare Chan

  Lee Tsz Yan (Ep. 5-6)

  Guest Role
• 
  Jim Tang Guest Role
• 
  Edith Au

  Granny Chan

  Guest Role
• 
  Man Yeung Guest Role
• 
  Terence Tung Guest Role
• 
  Lucas Yiu Guest Role

Unknown

• 
  Pang Hoi Kwan Unknown
• 
  Edsel Chiu Unknown
• 
  Bert Mok Unknown
• 
  Matthew Chu Unknown
• 
  Oman Lam Unknown
• 
  Jenny Wong Unknown
• 
  Deborah Poon Unknown
• 
  Kinlas Chan Unknown
• 
  Andy Wong Unknown
• 
  Joey Miu Unknown
• 
  Keith Mok Unknown