8.1/10
112,540
201 user 176 critic

Infernal Affairs (2002)

Mou gaan dou (original title)
Trailer
1:18 | Trailer
A story between a mole in the police department and an undercover cop. Their objectives are the same: to find out who is the mole, and who is the cop.

Directors:

Andrew Lau, Alan Mak

Writers:

Alan Mak, Felix Chong
Reviews
Popularity
3,522 ( 492)
Top Rated Movies #246 | 23 wins & 24 nominations. See more awards »

Videos

Photos

Learn more

More Like This 

Action | Crime | Drama
    1 2 3 4 5 6 7 8 9 10 7.3/10 X  

In this prequel to Mou gaan dou (2002), Chan Wing Yan has just become an undercover cop in the triads while Lau Kin Ming joins the police force. Both the triads and the police find an enemy in a rival crime boss.

Directors: Andrew Lau, Alan Mak
Stars: Edison Chen, Shawn Yue, Anthony Chau-Sang Wong
Action | Crime | Drama
    1 2 3 4 5 6 7 8 9 10 6.9/10 X  

Months after the events of the original film, Ming suspects a police superintendent as being a new mole for the triads, while years earlier, Yan embarks on his first mission.

Directors: Andrew Lau, Alan Mak
Stars: Tony Chiu-Wai Leung, Andy Lau, Leon Lai
Drama | Music | Romance
    1 2 3 4 5 6 7 8 9 10 8.1/10 X  

A baby boy, discovered in 1900 on an ocean liner, grows into a musical prodigy, never setting foot on land.

Director: Giuseppe Tornatore
Stars: Tim Roth, Pruitt Taylor Vince, Mélanie Thierry
Drama | Romance
    1 2 3 4 5 6 7 8 9 10 8.1/10 X  

Two neighbors, a woman and a man, form a strong bond after both suspect extramarital activities of their spouses. However, they agree to keep their bond platonic so as not to commit similar wrongs.

Director: Kar-Wai Wong
Stars: Tony Chiu-Wai Leung, Maggie Cheung, Ping Lam Siu
Drama | War
    1 2 3 4 5 6 7 8 9 10 8.1/10 X  

In the 1950s, fear and violence escalate as the people of Algiers fight for independence from the French government.

Director: Gillo Pontecorvo
Stars: Brahim Hadjadj, Jean Martin, Yacef Saadi
Harakiri (1962)
Drama | History
    1 2 3 4 5 6 7 8 9 10 8.7/10 X  

An elder ronin samurai arrives at a feudal lord's home and requests an honorable place to commit suicide. But when the ronin inquires about a younger samurai who arrived before him things take an unexpected turn.

Director: Masaki Kobayashi
Stars: Tatsuya Nakadai, Akira Ishihama, Shima Iwashita
A Wednesday (2008)
Crime | Drama | Mystery
    1 2 3 4 5 6 7 8 9 10 8.1/10 X  

A retiring police officer reminisces about the most astounding day of his career. About a case that was never filed but continues to haunt him in his memories - the case of a man and a Wednesday.

Director: Neeraj Pandey
Stars: Anupam Kher, Naseeruddin Shah, Jimmy Sheirgill
Action | Crime | Drama
    1 2 3 4 5 6 7 8 9 10 8.1/10 X  

In a small Korean province in 1986, three detectives struggle with the case of multiple young women being found raped and murdered by an unknown culprit.

Director: Bong Joon Ho
Stars: Kang-ho Song, Sang-kyung Kim, Roe-ha Kim
Action | Comedy | Western
    1 2 3 4 5 6 7 8 9 10 7.4/10 X  

In 1920s China, a bandit arrives in a remote provincial town posing as its new mayor, where he faces off against a tyrannical local nobleman.

Director: Wen Jiang
Stars: Yun-Fat Chow, Wen Jiang, You Ge
Drama | Music | Romance
    1 2 3 4 5 6 7 8 9 10 8.1/10 X  

The story of two men, who met as apprentices in the Peking Opera, and stayed friends for over 50 years.

Director: Kaige Chen
Stars: Leslie Cheung, Fengyi Zhang, Li Gong
Drama | Fantasy
    1 2 3 4 5 6 7 8 9 10 8.2/10 X  

The guests at an upper-class dinner party find themselves unable to leave.

Director: Luis Buñuel
Stars: Silvia Pinal, Jacqueline Andere, Enrique Rambal
Lust, Caution (2007)
Drama | History | Romance
    1 2 3 4 5 6 7 8 9 10 7.5/10 X  

During World War II era, a young woman, Wang Jiazhi, gets swept up in a dangerous game of emotional intrigue with a powerful political figure, Mr. Yee.

Director: Ang Lee
Stars: Tony Chiu-Wai Leung, Wei Tang, Joan Chen
Edit

Cast

Cast overview, first billed only:
Andy Lau ... Inspector Lau Kin Ming
Tony Chiu-Wai Leung ... Chen Wing Yan (as Tony Leung)
Anthony Chau-Sang Wong ... SP Wong Chi Shing (as Anthony Wong)
Eric Tsang ... Hon Sam
Kelly Chen ... Dr. Lee Sum Yee
Sammi Cheng ... Mary
Edison Chen ... Young Lau Kin Ming
Shawn Yue ... Young Chan Wing Yan
Elva Hsiao ... May
Chapman To ... Tsui Wai-keung
Ka Tung Lam ... Inspector B (as Lam Ka Tung)
Ting Yip Ng ... Inspector Cheung (as Ng Ting Yip)
Dion Lam ... Del Piero
Chi Keung Wan Chi Keung Wan ... Officer Leung (as Wan Chi Keung)
Hui Kam Fung Hui Kam Fung ... Cadet School Principal
Edit

Storyline

Chan Wing Yan, a young police officer, has been sent undercover as a mole in the local mafia. Lau Kin Ming, a young mafia member, infiltrates the police force. Years later, their older counterparts, Chen Wing Yan and Inspector Lau Kin Ming, respectively, race against time to expose the mole within their midst. Written by Aya

Plot Summary | Plot Synopsis

Taglines:

". . . choose how to live the rest of your life.: Inspector Lau Min Ming See more »


Motion Picture Rating (MPAA)

Rated R for violence | See all certifications »

Parents Guide:

View content advisory »
Edit

Details

Official Sites:

Official Facebook | Official site | See more »

Country:

Hong Kong

Language:

Cantonese | English | Thai

Release Date:

12 December 2002 (Hong Kong) See more »

Also Known As:

Infernal Affairs See more »

Edit

Box Office

Budget:

$6,428,966 (estimated)

Opening Weekend USA:

$25,680, 26 September 2004

Gross USA:

$169,659

Cumulative Worldwide Gross:

$8,836,958
See more on IMDbPro »

Company Credits

Show more on IMDbPro »

Technical Specs

Runtime:

| (director's cut)

Sound Mix:

Dolby Digital

Aspect Ratio:

2.35 : 1
See full technical specs »
Edit

Did You Know?

Trivia

Yan and SP Wong briefly enter a stairwell before Wong takes the elevator. The number "4" is visible on the far wall, which is bad luck in China and Hong Kong as has been mentioned before. See more »

Goofs

When Lau goes to listen to the "sampler" CD that's been dropped off for him, he presses the button on the player and we see the CD drawer close twice - first in the long-shot, and then in a close-up that starts from a fully-open position on the drawer. See more »

Quotes

Sam: What thousands must die, so that Caesar may become the great.
See more »

Alternate Versions

For the Chinese version an alternate ("politically correct") ending was used. In it, Lau gets arrested when he leaves the elevator. See more »

Connections

Spoofed in Superjail!: The Superjail Inquisitor (2014) See more »

Soundtracks

Infernal Affairs
Composed & Arranged by Ronald Ng
Performed by Andy Lau and Tony Chiu-Wai Leung (as Tony Leung)
Produced by Ronald Ng and Kwok-Leung Chan
O.P. BMG Music Publishing Hong Kong, Ltd./Catchy Music Publishing, Ltd.
See more »

Frequently Asked Questions

See more »

User Reviews

At it's heart, a gripping cop thriller
2 March 2004 | by bob the mooSee all my reviews

As cadets, Lau and Chan both show promise as police officers. However, Chan is removed from the training and send to be a long-term undercover in Sam's gang. However, unbeknownst to the police, Lau is also a long-term mole who is feeding information back to Sam. When Sam and police chief SP Wong both have their operations scuppered, each realises the other has a mole and sets out to uncover each. With each other's lives at risk, Lau and Chan must be the first to uncover the other.

I decided to see this after hearing good things about it but I was conscious that often foreign films can be given more leniency than Western films doing the same thing. After a slightly confusing opening few moments as characters settle down (not helped by using completely different actors for characters at late teens and late 20's - do people change that much?) the film immediately becomes gripping. The plot may well have the occasional hole and have unnecessary personal details (Lau's girlfriend and Chan's ex weren't really needed) but the central story is well written and told with such urgency that it is hard not to be totally engaged.

The film doesn't have many massive shoot outs or action scenes but it has a pretty consistent sense of tension that is enjoyable right up to a typical but impacting ending. The direction is stylish and only occasionally overuses the slow-mo jump cuts. It may owe more to American cinema than that of the Orient but it is still a very good film and I hope the inevitable remake will be as good.

The cast don't need to do that much apart from look intense and portray the tension of the story in a realistic fashion - something that they do well. At times the lead two actors are pushed out of this by the personal asides but they happily keep things on track. Both Lau and Leung play it very well - it never came down to good guy/bad guy and the audience was pretty well split. Wong is a solid officer while Tsang is good as Sam. Chen and Cheng may not have a great deal to do apart from slowing the film but they both look good doing it.

Overall this is a solidly enjoyable cop thriller, regardless of what country it comes from. It will eventually be remade I imagine and when it is I hope that it manages to retain it's consistent sense of tension, double-edged characters and a real tight hold on it's audience just as this did here.


89 of 108 people found this review helpful.  Was this review helpful to you? | Report this
Review this title | See all 201 user reviews »

Contribute to This Page

Free Movies and TV Shows You Can Watch Now

On IMDb TV, you can catch Hollywood hits and popular TV series at no cost. Select any poster below to play the movie, totally free!

Browse free movies and TV series

Stream Trending Movies With Prime Video

Enjoy a night in with these popular movies available to stream now with Prime Video.

Start your free trial



Recently Viewed