Highs and Lows

Producer

• 
  Lam Chi Wah

Main Role

• 
  Raymond Lam

  Wai Sai Lok / Happy Sir

  Main Role
• 
  Elaine Ng

  Yu Wing Tung / Madam Yu / "Helen"

  Main Role
• 
  Ella Koon

  Ko Hei Suen / "Sandy"

  Main Role
• 
  Michael Miu

  Heung Wing / "Gordon"

  Main Role
• 
  Kate Tsui

  Chan Ka Bik / "Pat"

  Main Role

Support Role

• 
  Kayi Cheung

  Fok Seung Fa / Fa Lui

  Support Role
• 
  Jack Hui

  Hui Ka Git

  Support Role
• 
  Rosanne Lui

  Ding Siu Mei

  Support Role
• 
  Law Lok Lam

  Jeng Ji Ceng / Jun Co

  Support Role
• 
  Lily Ho

  Lei Hoi Jing / "Esther"

  Support Role
• 
  Kirby Lam

  Lam Sau Ji

  Support Role
• 
  Geoffrey Wong

  Fong Coek Lun / "Ivan"

  Support Role
• 
  MC Jin

  Wu De Tian

  Support Role
• 
  Alex Lam

  Nin You Fu

  Support Role
• 
  Derek Kok

  Ho Kwai

  Support Role
• 
  Ben Wong

  Poon Hok Lai / Poon Sir / "Brian"

  Support Role
• 
  Luvin Ho

  Natalie

  Support Role
• 
  Bryant Mak

  Chan Ka Jun

  Support Role
• 
  Hugo Wong

  Li Ji Cheng

  Support Role
• 
  Quinn Ho

  Cheung Yuk Su

  Support Role
• 
  Rainbow Ching

  Lam Choi Lan

  Support Role
• 
  Alice Fung Support Role
• 
  Steve Lee Support Role
• 
  Lam King Kong Support Role
• 
  Forest Chan Support Role
• 
  Wong Wai Tak Support Role
• 
  Mak Ka Lun Support Role
• 
  Leo Tsang Support Role
• 
  Elkie Chong

  Yau Yee

  Support Role
• 
  Ricky Wong Support Role
• 
  Henry Yu Support Role
• 
  Adam Ip Support Role
• 
  Max Cheung Support Role
• 
  Rocky Cheng Support Role
• 
  Chan Wing Chun Support Role
• 
  Amy Ng Support Role
• 
  Jason Lam Support Role
• 
  Tony Kwong Support Role
• 
  Yu Chi Ming Support Role
• 
  Bryan Cheng Support Role
• 
  Helen Ng Support Role
• 
  Man Yeung Support Role
• 
  Candice Chiu Support Role
• 
  GoGo Cheung Support Role
• 
  Parkman Wong Support Role
• 
  Calvin Lui Support Role
• 
  William Chak Support Role
• 
  Vincent Lam Support Role
• 
  Jacky Lee Support Role
• 
  Hebe Chan Support Role
• 
  Miguel Choi Support Role
• 
  Cheng Shu Fung Support Role
• 
  Eddie Law Support Role
• 
  Gordon Siu Support Role
• 
  Kimmi Tsui Support Role
• 
  Kerry Chan Support Role
• 
  Ko Chun Man Support Role
• 
  Alex Yung Support Role
• 
  James Wong Support Role
• 
  Brian Burrell

  [Colombian Drug Dealer]

  Support Role
• 
  Kau Cheuk Nang Support Role
• 
  David Do Support Role
• 
  Ho Chun Hin Support Role

Guest Role

• 
  Jerry Koo

  Tat Q

  Guest Role
• 
  Ram Chiang

  [Agent]

  Guest Role
• 
  Andy Sui Guest Role
• 
  Milkson Fong Guest Role
• 
  Joe Yau

  (Ep. 22)

  Guest Role
• 
  Janice Ting

  Lei Wai Ting

  Guest Role
• 
  Martin Tong

  Chan Moon (Ep. 1-4)

  Guest Role
• 
  Li Wai Kin Guest Role
• 
  Helen Seng Guest Role
• 
  Snow Suen Guest Role
• 
  Lily Leung

  Gordan's mother

  Guest Role
• 
  Siu Lai Man Guest Role
• 
  Marcus Kwok

  [Prosecutor] (Ep. 4)

  Guest Role
• 
  Alan Wan

  (Ep. 15)

  Guest Role
• 
  Wong Wai Tong Guest Role

Bit part

• 
  Yeung Shui Lun Bit part
• 
  Owen Cheung

  [Gangster] (Ep. 23)

  Bit part
• 
  Calinda Chan

  [Salesperson] (Ep. 21)

  Bit part
• 
  Leo Lee Bit part

Unknown

• 
  Ronan Pak Unknown
• 
  Patrick Dunn Unknown
• 
  Kevin Tong Unknown
• 
  Terrence Huang Unknown
• 
  Andy Wong Unknown
• 
  Bert Mok Unknown