Originally released as a motion picture in 2002.
Special features: Alternative ending; "Confidential file" a behind-the-scenes look at Infernal affairs; the making of Infernal affairs; international trailer; original Chinese trailer.
Directors of photography, Andrew Lau, Lai Yiu Fai ; editors, Danny Pang, Pang Ching Hei ; music, Chan Kwong Wing.
Chinese and dubbed English dialogues; optional subtitles in English and Spanish.