任達華

Tsim Kin-Yip

劉心悠

Ann

張家輝

Kwan Ping-Man

溫碧霞

Pun Siu-Yuen

邵美琪

Fong

余安安

Ann's mother

單立文

Ann's father

卓韻芝

Professor Teaching Electronics

Hiroshi Fukazawa

Toy Store Boss

林家棟

Fai

Benny Lau Wai-Hang

Officer Chan Fai

Gregory Charles Rivers

Duty Officer

邵音音

Professor of Poison

Foo Hiu-Mei

Policewoman Recording Crime Report

詹瑞文

Man in Wheelchair

彭浩翔