Andy Lau Tak-wah

as Senior Inspector Lau Kin-ming

Tony Leung Chiu-wai

as Chan Wing-yan

Anthony Wong Chau-sang

as Superintendent Wong Chi-shing

Eric Tsang Chi-wai

as Hon Sam

Kelly Chen Hui-lin

as Dr. Lee Sum-yee

Sammi Cheng Sau-Man

as Mary

Elva Hsiao Ya-hsuan

as May

Chapman To Man-Chat

as Tsui Wai-keung