Editing Infernal Affairs (section)

==Cast==
* [[Andy Lau]] as Senior Inspector Lau Kin-ming ({{lang|yue-HK|劉健明}}), Hon's mole in the Hong Kong Police Force.
** [[Edison Chen]] as young Lau Kin-ming
* [[Tony Leung Chiu-wai|Tony Leung]] as Chan Wing-yan ({{lang|yue-HK|陳永仁}}), an undercover cop in Hon's triad.
** [[Shawn Yue]] as young Chan Wing-yan
* [[Anthony Wong (Hong Kong actor)|Anthony Wong]] as Superintendent Wong Chi-shing ({{lang|yue-HK|黃志誠}}), Chan's superior.
* [[Eric Tsang]] as Hon Sam ({{lang|yue-HK|韓琛}}), the triad boss.
* [[Chapman To]] as "Silly" Keung ({{lang|yue-HK|傻強}}), Hon's henchman.
* [[Gordon Lam]] as Inspector B (大B; Big B), Lau's subordinate who is also a mole in the HKPF.
* [[Sammi Cheng]] as Mary, Lau's fiancée.
* [[Kelly Chen]] as Lee Sum-yee ({{lang|yue-HK|李心兒}}), Chan's psychiatrist.
* [[Berg Ng]] as Senior Inspector Cheung ({{lang|yue-HK|張Sir}}), Wong's subordinate.
* [[Wan Chi Keung|Wan Chi-keung]] as Officer Leung ({{lang|yue-HK|梁Sir}}), the Chief Superintendent of the Internal Affairs department.
* [[Dion Lam]] as Del Piero ({{lang|yue-HK|迪路}}), Hon's henchman.
* [[Elva Hsiao]] as May, Chan's ex-girlfriend.
* Hui Kam-fung as Officer Yip ({{lang|yue-HK|葉Sir}}), Chan's cadet school principal