Man's Best Friend

Main Role

• 
  Louis Koo

  Tai Chin Shek

  Main Role
• 
  Jessica Hsuan

  Man Wing Long / "A Wing"

  Main Role
• 
  Sammi Cheng

  Au Tsz Shan / Susan

  Main Role

Support Role

• 
  Jerry Lamb

  Chu Tit Nam [Chin Shek's best friend]

  Support Role
• 
  Joe Ma

  Lam Hok Yan / Sam [Veterinarian]

  Support Role
• 
  Emotion Cheung

  Lee Chu Wa

  Support Role
• 
  Law Lok Lam

  Tai Chung / Charlie [Chin Shek's uncle]

  Support Role
• 
  Timothy Cheng

  Ken [L&B Advertising GM]

  Support Role
• 
  Helena Law

  Chan Mui [Wing Long's maternal grandmother]

  Support Role
• 
  Ching Siu Lung

  Hong Kam Sing [Sergeant and Instructor of the Police Dog team]

  Support Role
• 
  Jerry Koo

  Mr. Leung [BB Pub owner]

  Support Role
• 
  Kenny Wong

  Chiu Kwok Keung [Police Dog team handler]

  Support Role
• 
  Lam King Kong

  Chan Chi On [Police Dog team handler]

  Support Role
• 
  Daniel Kwok

  [Police officer]

  Support Role
• 
  Andy Sui

  [Police officer]

  Support Role
• 
  Russell Cheung

  [Police officer]

  Support Role
• 
  Man Yeung

  Kwong [BB Pub bartender]

  Support Role
• 
  Jenny Wong

  Carol [Ken's secretary]

  Support Role
• 
  Peter Pang

  Sam [Tsz Shan's co-worker]

  Support Role
• 
  Sunny Lau

  Dick [Tsz Shan's co-worker]

  Support Role

Guest Role

• 
  Leo Tsang

  [Police officer] (Ep. 1)

  Guest Role
• 
  Yoe Biu

  [Thief] (Ep. 1)

  Guest Role
• 
  Wong Wai Leung

  [Illegal immigrant] (Ep. 1)

  Guest Role
• 
  Deon Cheung

  [Police officer] (Ep. 1-2)

  Guest Role
• 
  Sam Leung

  [Chief inspector] (Ep. 1-2)

  Guest Role
• 
  Ricky Wong

  Sze Tai Lung [Rocky's owner] (Ep. 1-2)

  Guest Role
• 
  Kwok Tak San

  Lee Pak Sam [Chief of Police Dog team] (Ep. 1-2)

  Guest Role
• 
  Cheng Ka Sang

  [Police officer] (Ep. 1, 18)

  Guest Role
• 
  David Do

  [Thug] (Ep. 2)

  Guest Role
• 
  Mak Ka Lun

  [Police Dog team handler] (Ep. 2)

  Guest Role
• 
  Cheung Hak

  [Police Dog team handler] (Ep. 2)

  Guest Role
• 
  Vincent Cheung

  [Police Dog team handler] (Ep. 2)

  Guest Role
• 
  Ngai Wai Man

  [Police Dog team handler] (Ep. 2)

  Guest Role
• 
  Forest Chan

  [Kwok Keung's murderer] (Ep. 2-3)

  Guest Role
• 
  John Tang

  Au Tze Lung [Tsz Shan's brother] (Ep. 2, 14, 16-17)

  Guest Role
• 
  Choi Kwok Hing

  Au Wing [Tsz Shan & Tze Lung's father] (Ep. 2, 15-17)

  Guest Role
• 
  Helen Ma

  Wong Tsui Fan [Tsz Shan & Tze Lung's mother] (Ep. 2, 15-17)

  Guest Role
• 
  Sunny Dia

  [Murderer] (Ep. 3)

  Guest Role
• 
  Eddie Ho

  [Young couple] (Ep. 3)

  Guest Role
• 
  Chiu Shek Man

  Martin [Tsz Shan's co-worker] (Ep. 3)

  Guest Role
• 
  So Lai Ming

  [Tsz Shan's co-worker] (Ep. 3)

  Guest Role
• 
  Eddie Li

  Mr. Leung [Tsz Shan's superior] (Ep. 3)

  Guest Role
• 
  Kitty Lau

  [Dog owner] (Ep. 7)

  Guest Role
• 
  Mak Chi Wan

  [Robber] (Ep. 8)

  Guest Role
• 
  Po Ming Nam

  [Bomb disarming expert] (Ep. 9)

  Guest Role
• 
  Sit Shun Kei

  [Man in robe] (Ep. 10)

  Guest Role
• 
  Man Kit Wan

  Mrs. Chan [Animal shelter director] (Ep. 11)

  Guest Role
• 
  Akai Lee

  [BB Pub customer] | [Air conditioner guy] (Ep. 13)

  Guest Role
• 
  Homer Cheung

  [Advertising director] (Ep. 13)

  Guest Role
• 
  Bruce Li

  [Boat owner] (Ep. 20)

  Guest Role
• 
  Ling Hon

  Mr. Chan [Watchman] (Ep. 20)

  Guest Role
• 
  June Chan

  May [Hok Yan's fiancee] (Ep. 20)

  Guest Role
• 
  Ricky Lee

  Wong Ying [Director]

  Guest Role
• 
  Jason Lam

  [Ivy's boyfriend]

  Guest Role