Cast
- Andy Lau as Senior Inspector Lau Kin-ming (劉健明, Jyutping: lau4 gin6 ming4, Pinyin: Liú Jiànmíng), Hon's mole in the police force
- Edison Chen as young Lau Kin-ming
- Tony Leung as Chan Wing-yan (陳永仁, J: can4 wing5 jan4, P: Chén Yǒngrén), an undercover cop in Hon's triad
- Shawn Yue as young Chan Wing-yan
- Anthony Wong as Superintendent Wong Chi-shing (黃志誠, J: wong4 zi3 sing4, P: Huáng Zhìchéng), Chan's superior
- Eric Tsang as Hon Sam (韓琛, J: hon4 sam1, P: Hán Chēn), the triad boss
- Chapman To as Tsui Wai-keung / "Crazy Keung" (徐偉強, P: Xú Wěiqiáng / 傻強), Hon's henchman
- Gordon Lam as Lam Kwok-ping / "Inspector B" (林國平, J: lam4 gwok3 ping4, P: Lín Guópíng / 大B, daai6B, dàB), Lau's subordinate who is actually also a mole in the police force
- Kelly Chen as Dr. Lee Sum-yee (李心兒, J: lei5 sam1 jan4, P: Lǐ Xīnér), Chan's therapist
- Sammi Cheng as Mary, Lau's girlfriend
- Berg Ng as Senior Inspector Cheung (張Sir)
- Wan Chi-keung as Officer Leung (梁Sir), the police chief
- Dion Lam as Del Piero (迪比亞路), Hon's henchman
- Elva Hsiao as May, Chan's ex-girlfriend
- Hui Kam-fung as Yip, principal of the police academy
- Chan Charoenwichai as Paul, the Thai drug dealer
Read more about this topic: Infernal Affairs
Famous quotes containing the word cast:
“Shoals of corpses shall witness, mute, even to generations to come, before the eyes of men that we ought never, being mortal, to cast our sights too high.”
—Aeschylus (525–456 B.C.)
“Has he all that the world loves and admires and covets?—he must cast behind him their admiration, and afflict them by faithfulness to his truth, and become a byword and a hissing.”
—Ralph Waldo Emerson (1803–1882)
“For it is with the mysteries of our religion, as with wholesome pills for the sick, which swallowed whole, have the virtue to cure; but chewed, are for the most part cast up again without effect.”
—Thomas Hobbes (1588–1679)