Infernal Affairs

Hon Sam, a Hong Kong Triad boss, sends Lau Kin-ming, a young gangster, to the police academy to serve as his spy in the Hong Kong Police Force. Around the same time, Chan Wing-Yan, a young police cadet, is seemingly expelled from the police academy. In reality, Chan has secretly become an undercover cop, reporting only to Superintendent Wong Chi-shing, who sends him to infiltrate Hon's triad. Over the course of ten years, Chan experiences great stress from his undercover work while Lau quickly rises through the ranks in the police force, eventually becoming a Senior Inspector. Wong and his team interrupt a deal between Hon and a group of Thai cocaine dealers after receiving a tip from Chan. However, Lau alerts Hon, giving him enough time to get his henchmen to dispose of the evidence.

After this incident, both Wong and Hon realize that they have a spy within their own organizations, placing them in a race against time to find out who the spy is. Chan nearly finds out Lau's identity when he tries to follow Lau after seeing him talking to Hon in a cinema; Lau manages to get away before Chan could see his face. By this time, both Chan and Lau are struggling with their double identities – Chan starts losing faith in himself as a cop after being a gangster for ten years; Lau becomes more accustomed to the life of a police officer and wants to end his association with the triad. At their next meeting on a rooftop, Wong wants to pull Chan out of undercover work for fear of his safety.

However, Hon, who knows about the meeting from Lau, sends "Crazy" Keung and other henchmen to confront them. Chan escapes from the building while Wong tries to distract the gangsters and ends up being thrown off the roof to his death. Just then, the police show up and a shootout ensues. Keung, not knowing that Chan is the spy, drives them away from the scene but dies from a gunshot wound later. When the news report that Keung was actually another undercover cop, Hon assumes that he was the spy and that Chan killed him to protect himself. Lau retrieves Wong's cell phone and contacts Chan; both of them agree to foil a drug deal by Hon. The plan succeeds and many of Hon's men are arrested, while Lau betrays and kills Hon.

Everything seems to have returned to normal – Chan can revert to his true identity as a cop, while Lau has erased his criminal connections by eliminating the triad. However, back at the police headquarters, Chan discovers that Lau was the spy and leaves immediately. Realising what has happened, Lau erases Chan's file from the police database and makes a copy on his personal computer, intending to use the proof of Chan's identity as leverage, so that he would not reveal his real identity. Chan sends to Lau a compact disc with a recording that Hon kept between himself and Lau. The disc inadvertently ends up in the hands of Lau's girlfriend, Mary. Chan and Lau meet on the same rooftop where Wong was killed earlier. Chan disarms Lau and holds his pistol to Lau's head; Lau states calmly that he "wants to be a good person" now, but Chan rejects Lau's plea to help him conceal his criminal past.

Inspector "Big B" arrives on the scene shortly and orders Chan to release Lau. Chan holds Lau as a hostage at gunpoint and backs into an elevator, but gets shot in the head by "Big B" when he moves his head from behind Lau. "Big B" then reveals to Lau that he is also a spy planted by Hon in the police force, and assures Lau that he has destroyed evidence of Lau's criminal associations. When they take the elevator to the ground floor, Lau kills "Big B". Lee discovers records that prove Chan's identity as an undercover cop, while "Big B" is identified as the spy in the police force and the case is closed. Lau salutes Chan at his funeral, with Cheung and Lee present as well. A flashback reaffirms the point that Lau wished he had taken a different route in life.

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

An alternate ending for the film was shot in order to comply with Article 25 (7) of the Chinese Film Administration Regulations specifying that films cannot propagate obscenity, gambling or violence, or abet to commit crimes.[3] In the original (Hong Kong) ending, Lau concealed his true identity as a Triad spy and identified himself as a police officer to avoid legislative punishment. Therefore, the original ending was deemed to promote criminal activity and injustice, and an alternate ending was filmed to make the film suitable for mainland China. In the alternate ending, inspector Cheung discovers evidence of Lau's criminal activity and immediately arrests Lau outside the elevator. This alternate ending was shown in mainland China and Malaysia.[4]

The original film score for Infernal Affairs was written and performed by Chan Kwong-wing.

The theme song, Infernal Affairs (無間道), was composed by Ronald Ng, lyrics provided by Albert Leung, and performed in Cantonese and Mandarin by Andy Lau and Tony Leung.

Although not included in the soundtrack, Tsai Chin's (蔡琴) song "Forgotten Times" (《被遺忘的時光》) features prominently in this film as a recurring element of its storyline, and also in its sequels.

With star power, visual allure, and an engaging script, Andrew Lau and Alan Mak's Infernal Affairs /《無間道》(2002) did very well critically and financially, spawned two sequels and a television series, and attracted the attention of Hollywood.[15] In 2003, Brad Pitt's production company Plan B Entertainment acquired the rights for a Hollywood remake, named The Departed, which was directed by Martin Scorsese, and starred Leonardo DiCaprio, Matt Damon, Jack Nicholson, and Mark Wahlberg, set in Boston, Massachusetts, roughly based on the life of famed Boston mobster James "Whitey" Bulger. The Departed was released on 6 October 2006 and won the Academy Award for Best Picture. Andrew Lau, the co-director of Infernal Affairs, who was interviewed by Hong Kong newspaper Apple Daily, said: "Of course I think the version I made is better, but the Hollywood version is pretty good too. [Scorsese] made the Hollywood version more attuned to American culture." Andy Lau,[16] one of the main actors in Infernal Affairs, when asked how the movie compares to the original, said: "The Departed was too long and it felt as if Hollywood had combined all three Infernal Affairs movies together."[17] Lau pointed out that the remake featured some of the "golden quotes" of the original but did have much more swearing. He ultimately rated The Departed 8/10 and said that the Hollywood remake is worth a view, though according to Lau's spokeswoman Alice Tam, he felt that the combination of the two female characters into one in The Departed was not as good as the original storyline.[18]

Lau, Tsang, and Jacky Cheung parodied the cinema scene to promote the Hong Kong Film Awards. Lau and Tsang, in their respective characters, go through the scene where they meet to gather info on the undercover cop amongst Hon Sam's gang. Lau Kin-ming asks Hon, "Why do we always meet in a cinema?", to which Hon answers, "It's quiet. No one comes to movies". Cheung comes out from the shadows behind them and says, "I don't know...quite a few people watch movies" and we see a slew of Hong Kong celebrities watching various clips of Hong Kong films on the screen. Originally Tony Leung was going to appear but scheduling conflicts led to the recasting.

The 2003 TVB spoof celebrating the Chinese New Year called Mo Ba To (吐氣羊眉賀新春之無霸道), the 2004 comedy film Love Is a Many Stupid Thing by Wong Jing, and the 2004 TVB television drama Shades of Truth were re-writings based on the plot of the film.

In Taiwan SHODA (劉裕銘) and a secondary school student Blanka (布蘭卡) cut and rearranged the original film and inserted new sound tracks to produce their videos Infernal Affairs CD pro2 and Infernal Affairs iPod on the web. The videos had many views and both producers removed their videos after receiving cease and desist letters from the Group Power Workshop Limited (群體工作室), the Taiwan distributor of the film.[19]

Media Asia released a limited edition of eight-DVD set of the Infernal Affairs trilogy in an Ultimate Collectible Boxset (無間道終極珍藏DVD系列(8DVD套裝)) on 20 December 2004. Features included an online game and two Chinese novelisations of the film series by Lee Muk-Tung (李牧童), titled 無間道I+II小說 and 無間道III終極無間小說.

The hi-fi shop scene was later recreated with additions of excerpts of the film to encourage businesses to join the Quality Tourism Services Scheme in Hong Kong.[20]

In 2009, a Korean remake City of Damnation, which was directed by Kim Dong-won was released on 22 January 2009. In 2009, a Telugu remake Homam, which directed and acted by JD Chakravarthy along with Jagapathi Babu was released and became a notable movie.[21][22] In 2012, Double Face (ダブルフェイス), a Japanese television remake starring Hidetoshi Nishijima was released by TBS and WOWOW.[23] The production aired in two parts: "Police Impersonation" on WOWOW and "Undercover" on TBS.

A TV series remake debuted in 2018 produced by Media Asia and former TVB producer Tommy Leung. The series, which is titled Infernal Affairs like the film, stars Gallen Lo, Damian Lau, Paul Chun, Lo Hoi-pang, Eric Tsang, Derek Kok, Dominic Lam, Toby Leung and Yuen Biao.[24] The story takes place years after the films' events, with some minor characters reprising their roles alongside a new cast. The TV series uses the same concept as the film, but with an entirely new story and characters, and the setting expanded beyond Hong Kong to include Thailand and Shenzhen. It stretched through three seasons with each season consisting of 12 episodes.[25]

Hindi remake is going to be a joint development between Warner Bros. India and Mumbai – based banner Azure and is set for a remake for a two-picture deal[26]

The success of the film inspired many genres, including an open-world video game from United Front Games titled Sleeping Dogs (or True Crime: Hong Kong before canceled by Activision Blizzard in 2011),[27] with the protagonist of the story infiltrating the criminal underworld as an undercover police.

• Infernal Affairs film series
• Cinema of Hong Kong
• List of Hong Kong films
• Andy Lau filmography
• List of films featuring surveillance
• List of films set in Hong Kong

• Infernal Affairs at IMDb
• Infernal Affairs at Box Office Mojo
• Infernal Affairs at Rotten Tomatoes
• Infernal Affairs at Metacritic