Go! Go! Go! Operation C9

Main Role

• 
  Samantha Ko

  Yu Siu Kiu /" C9"/"Cute Ma"

  Main Role
• 
  Kenneth Ma

  Ko Dai Ching / Ah Ching / Ching Gor / "B12" / "Bravo" [Cute Ma's husband]

  Main Role
• 
  Chris Lai

  Ma Leoi Si / Biu Gor / Ngau Pa /" B3"/"Aries"

  Main Role

Support Role

• 
  Brian Chu

  Ko Dai Qiu / DQ Jay / DQ Suk Suk / "H51" / "DQ"

  Support Role
• 
  Kiwi Yuen

  Ko Ching Lai / Lai Jie / Ah Lai [Dai Qiu and Dai Ching's elder sister]

  Support Role
• 
  Lenna Yeung

  Betty Leung / Bei Tai /" Betty" [Bravo's old wife and Ko Hei Long's mother and Siu Kiu's rival]

  Support Role
• 
  Steve Lee

  Ko Au / Au Jay / Au Bak [Ching Lai and Dai Qiu and Dai Ching's father]

  Support Role
• 
  Jessica Kan

  Suen Law Na / "Laura" [Suen Tai's daughter]

  Support Role
• 
  Yvonne Lam

  Suen Tai [Laura's mother]

  Support Role
• 
  Geoffrey Wong

  S Man / "Solar" [Aries and Cute Ma's former boss / Kelly's master]

  Support Role
• 
  Becky Lee

  Hong Dak Lei /" A5"/"Kelly" [Cute Ma and Aries's own colleague/Solar's student]

  Support Role
• 
  Derek Wong

  Wong Kan / Dau Fu Wong [Bravo's friend]

  Support Role
• 
  Sam Tsang

  Paang Zi San [Betty's boyfriend and Dai Ching's enemy]

  Support Role
• 
  Penny Chan

  Se Git On / Lang Min

  Support Role
• 
  Yeung Shui Lun Support Role
• 
  Man Yeung Support Role
• 
  So Lai Ming Support Role
• 
  Alan Tam Support Role
• 
  Eddie Pang

  Shan Ling

  Support Role
• 
  Chun Kai Wai Support Role
• 
  Ng Shui Ting Support Role
• 
  Akai Lee Support Role
• 
  Kimmi Tsui Support Role
• 
  Antonio Ng

  (Ep. 5-6, 9, 12-13)

  Support Role

Guest Role

• 
  Amisha Ng

  Joyce (Ep. 1)

  Guest Role
• 
  Alice Fung

  [Paang Zi San's mother] (Ep. 14)

  Guest Role
• 
  Dolby Kwan

  [Robber] (Ep. 12)

  Guest Role
• 
  Ray Lo

  (Ep. 8,12,14)

  Guest Role
• 
  Amy Ng

  [Anchor] (Ep. 5)

  Guest Role
• 
  Shally Tsang

  Sun Dan Wun (Ep. 1)

  Guest Role
• 
  Cecilia So

  [Ko Hei Long's principal] (Ep. 2)

  Guest Role
• 
  Samantha Chuk

  Si Lai (Ep. 2, 9, 16)

  Guest Role
• 
  Kiko Leung

  Ko Ching Lai [Young]

  Guest Role
• 
  Doris Chow

  Wong Tai (Ep. 12)

  Guest Role
• 
  Hana Kuk

  [Fitness room customer] (Ep. 15)

  Guest Role
• 
  Oman Lam

  [Killer] (Ep. 1)

  Guest Role
• 
  Terence Tung Guest Role
• 
  Janice Pang Guest Role
• 
  Tse Ho Yat Guest Role
• 
  Lawrence Lau Guest Role
• 
  Thomas Ng Guest Role
• 
  Leo Kwan

  (Ep. 16)

  Guest Role
• 
  Felix Ng Guest Role
• 
  Albert Cheung

  Max (Ep. 1)

  Guest Role
• 
  Cheng Shu Fung

  Liu Cheng Jiu

  Guest Role
• 
  Au Hin Wai

  [North Korean scientist]

  Guest Role
• 
  Simon Tang Guest Role
• 
  Wong Wai Tong Guest Role
• 
  Janice Ting

  [Young assistant]

  Guest Role
• 
  Mina Kwok Guest Role
• 
  Lucas Yiu Guest Role
• 
  Marcus Kwok

  [Doctor] (Ep. 13)

  Guest Role
• 
  Jacky Lee Guest Role
• 
  Kris Lam Guest Role

Bit part

• 
  Miguel Choi Bit part
• 
  Danny Lo Bit part

Unknown

• 
  Sandy Leung

  (Ep. 1)

  Unknown
• 
  Jenny Wong Unknown
• 
  Irina Tang

  Kennis (Ep. 1)

  Unknown