The Line Watchers

Main Role

• 
  Benjamin Yuen

  Hoi Fung / Fung Sir

  Main Role
• 
  Mandy Wong

  Kwan Pui Yan / "Madam Kwan" / "Yan"

  Main Role
• 
  Venus Wong

  Wan Chi Kei / "Madam Wan"

  Main Role
• 
  Carlos Chan

  Chan Ka Hing

  Main Role
• 
  Moon Lau

  Fong Ching Long

  Main Role

Support Role

• 
  Karl Ting

  Yip King On / "KO"

  Support Role
• 
  Tiffany Lau

  Kwai Ting Fei

  Support Role
• 
  Yoyo Chen

  Yip Kai On

  Support Role
• 
  C Kwan

  Ma Piu

  Support Role
• 
  Jack Wu

  Alvin

  Support Role
• 
  Mark Ma

  Sam Wai Yip

  Support Role
• 
  Joey Law

  Sze Lap Yin / "Marcus"

  Support Role
• 
  Yeung Chiu Hoi

  Cheung Chi Kwan

  Support Role
• 
  Derek Wong

  Chiu Chi Lung

  Support Role
• 
  Jarryd Tam

  Lei Man On / "Leon Sir"

  Support Role
• 
  Ken Law

  Rock

  Support Role
• 
  Cayley Mak

  Sophie

  Support Role
• 
  Alvin Ng

  Dai Po Man

  Support Role
• 
  Telford Wong

  Poon Ho Yeung

  Support Role
• 
  Stefan Wong

  Wan Sir

  Support Role
• 
  Fanny Ip

  Shirley

  Support Role
• 
  Curtis Ho

  Poon Yat Chun

  Support Role
• 
  Au Hin Wai

  Doctor Lu

  Support Role
• 
  Karlie Chung

  Tsui Man Lei

  Support Role
• 
  Rachel Ching

  Ada

  Support Role
• 
  Terrence Huang

  Max

  Support Role
• 
  Osanna Chiu

  Tammy

  Support Role
• 
  Doris Chow

  Yvonne

  Support Role
• 
  Bobo Yeung Support Role
• 
  Elvina Kong Support Role
• 
  Mary Hon Support Role
• 
  Gabriel Harrison Support Role
• 
  Arnold Kwok Support Role
• 
  Chloe Nguyen Support Role
• 
  Penny Chan Support Role
• 
  Frankie Choi Support Role
• 
  Carlos Koo Support Role
• 
  Felix Ng Support Role
• 
  Sophie Yip Support Role
• 
  Adrien Yau Support Role
• 
  Chun Kai Wai Support Role
• 
  Ng Shui Ting Support Role
• 
  Kings Wong Support Role
• 
  Chiu Lok Yin Support Role
• 
  Man Yeung Support Role
• 
  Janice Pang Support Role
• 
  Arthur Sy Support Role
• 
  Kelvin Liu Support Role
• 
  Judy Tsang Support Role
• 
  Billy Cheung Support Role
• 
  Mina Kwok Support Role
• 
  Patrick Lam Support Role
• 
  Tony Chui Support Role
• 
  So Lai Ming Support Role
• 
  Burmie Wong Support Role
• 
  Athena Ng Support Role
• 
  Parkman Wong Support Role
• 
  Miguel Choi Support Role
• 
  Justin Wong Support Role
• 
  Ng Pui Yu

  Lo On Yi / "Natasha"

  Support Role

Guest Role

• 
  Lo Jun Fung

  Peter (Ep. 3)

  Guest Role
• 
  Eddie Pang

  Lan Guan Chao [Guan Wen's brother] (Ep. 4-6, 8)

  Guest Role
• 
  Michael Wai

  [Karaoke manager] (Ep. 20)

  Guest Role
• 
  Marcus Kwok

  Dr. Ku (Ep. 24-25)

  Guest Role
• 
  Tania Chan

  Pink

  Guest Role
• 
  Lucas Yiu

  Sky

  Guest Role
• 
  Blossom Chan

  Bonnie

  Guest Role
• 
  Rachel Wong

  Toby

  Guest Role
• 
  Jacky Lee Guest Role
• 
  Thomas Ng Guest Role
• 
  Albert Au Guest Role
• 
  Marco Lee Guest Role
• 
  Edsel Chiu Guest Role
• 
  Siu Lai Man Guest Role
• 
  Georgina Chan Guest Role
• 
  KC Wu Guest Role
• 
  Helen Seng Guest Role
• 
  Matthew Chu Guest Role
• 
  Albert Cheung Guest Role
• 
  Eric Cheng Guest Role
• 
  Fanny Lee Guest Role
• 
  Vincent Lam Guest Role
• 
  Oman Lam Guest Role
• 
  Alycia Chan Guest Role
• 
  Kitterick Yiu Guest Role
• 
  Jim Tang Guest Role
• 
  Jenny Wong Guest Role
• 
  Alan Tam Guest Role
• 
  Angela Lam Guest Role
• 
  Andy Wong Guest Role
• 
  Wong Wai Tong Guest Role

Unknown

• 
  Fred Cheung Unknown
• 
  Venus Tang Unknown
• 
  Danny Hung Unknown
• 
  Carmaney Wong Unknown
• 
  Ball Mang Unknown
• 
  Yuki Law Unknown
• 
  Deborah Poon Unknown