Simon Yam

Tsim Kin-Yip

Annie Liu

Ann

Nick Cheung Ka-Fai

Kwan Ping-Man

Irene Wan

Pun Siu-Yuen

Maggie Shiu

Fong

Candice Yu

Ann's mother

Pal Sinn Lap-man

Ann's father

Cheuk Wan-Chi

Professor Teaching Electronics

Lam Ka-Tung

Fai

Gregory Charles Rivers

Duty Officer

Susan Shaw

Professor of Poison

Foo Hiu-Mei

Policewoman Recording Crime Report

Jim Chim Sui-Man

Man in Wheelchair

Roderick Lam Chung-Kei