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Andy Lau as 刘健明（刘Sir） |
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陳冠希 as 青年刘健明 |
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Tony Leung Chiu-Wai as 陈永仁（阿仁） |
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余文樂 as 青年陈永仁 |
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Anthony Wong Chau-sang as 黄志诚（黄Sir、黄警司） |
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Eric Tsang as 韩琛（琛哥） |
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林家棟 as 林国平（大B） |
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Francis Ng as 倪永孝 |
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杜汶澤 as 徐伟强（傻强） |
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張耀揚 as 罗继贤 |
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Jun Hu as 陆启昌 |
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Daoming Chen as 沈澄 |
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黄志忠 as 沈亮 |
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陳慧琳 as 李心儿（李医生） |
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鄭秀文 as Mary（刘健明妻子） |
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蕭亞軒 as May （陈永仁前女友） |
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劉嘉玲 as Mary姐 （韩琛妻子） |
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黎明 as 杨锦荣 |
| Directing | Andrew Lau | Director |
| Directing | Alan Mak | Director |
| Writing | Alan Mak | Writer |
| Writing | Felix Chong | Writer |
