Tony Leung as Dr. Lau Mack

Sean Lau Ching-Wan as Chiu

Andy Hui Chi-On as Dr. Sam So

Christy Chung Lai-Tai as Jamie

Alex To as Dr. Roger Jaw

Hilary Tsui Ho-Ying as Zin

Eileen Tung Oi-Ling as Lok Mei

Law Kar-Ying as Wong Jau

Gigi Leung Wing-Kei as May

Richard Ng Yiu-Hon as Professor Bao

Law Kar as May's Father

Jordan Chan Siu-Chun as Tattoo Choir's Conductor

Lawrence Ng Kai-Wah as K.T.

Jessica Chow Jing as Fung

Wong Hei as Tiger

Farini Cheung Yui-Ling as Nurse

Wyman Wong Wai-Man as Brother Fook

Jerry Lamb Hiu-Fung as Tong Ching

Jimmy Wong Wa-wo as Secretary Pak

Winston Yeh Ying-Wen as Hospital Chief

Benjamin Chan Siu-Kwan as Hospital Assistant Chief

Mike Lau Wang-Bok as Mikey

Jeff Li as Student

Adrian Kwan as Tak

Chan Ka-Him as Kent

Dang Wing-Yiu as Tattoo Choir's Member

James Cheung as Tattoo Choir's Member

Jacob Cheung as Tattoo Choir's Member

Ben Luk Man-Wah as Tattoo Choir's Member

Benny Tse Chi-Wah as Tattoo Choir's Member

Samuel Leung Cheuk-Moon as Fook's Thug

Chu Ga-Yiu as Robber

Kwok-Choi Cheung as Robber

Tsang Kit-Ying as Ah Chi

Emana Leung Yuen-Man as Hooker

Jason Chu Wing-Tong as Missionary

Yu Jun-Fung as Reporter

Suen Ga-Man as Chairman of Medical Review Board

Stephen Wong Wai-Him as Chi's Father

June Chan Kei as Roger's Student

Yu Ngai-Ho as Medical Review Board