Tony Leung Ka-fai

Inspector Tang

Joyce Ni Shu-Chun

彭健新

Fire Unicorn

太保

Tai Bo

曹查理

Charles

莊文清

Mrs. Cow

Tsang Dao-may

Hon Yee-Sang

Tang's assistant

Christopher Durkin

Inspector Caine

胡大為

李海生

陸劍明

Man in toilet

Wu Chia-Hsiang

Cleaner at police station

唐基明

陳國權

Mr. Cow

Yen Li

Johnny Lee Man-Yiu

班潤生

Golden Mouse

Yat Boon-Chai

余慕蓮

Tsang Choh-Lam

Opium smoker detained at station

馮敬文

吳浣儀

Fa Dan Chun

Johnathan Chow Chun-Tung

孟浪

張連平

Policeman

Eddie Chan Shu-Chi

樓南光

翁世傑