Tony Leung Ka-faiLee Kong Cheung Siu-faiBoss Savage Jordan Chan Siu-chunMona's Agent Hung Wai-LeungArcade Player (uncredited) Lu Ching-tingSavage's Runner (uncredited) Ronald Yan Mau-keungSze-To's Boss Yuen BunSze-To's Boss (uncredited) Well Chin Wing-WaiClub Customer Li HaitaoClub Saxophonist Jimmy Wong Wah-woTaxi Driver (uncredited) Johnnie ToDirector / Producer Stephen Lam Bing-KwanProducer Cheng Siu-KeungDirector Of Photography Stanley Cheung Sai-KitCostume Design Pad Chan Wai-HungFirst Assistant Director Ho Chi-hangFirst Assistant Director Law Wing-cheongAssistant Director David M. RichardsonEditor Simon FungAssistant Editor Peter Kam Pau-TatOriginal Music Composer Chiu Chi-shingUnit Manager