The trilogy's monumental legacy is perhaps most visible in Martin Scorsese's 2006 remake, The Departed , which won the Academy Award for Best Picture. However, the films are more different than they are alike. The Departed is a sprawling, operatic epic, while Infernal Affairs is a sleek, 101-minute thriller. But the crucial difference lies in the third act.
We see the final months of Chan Wing-yan (Tony Leung). It adds depth to his isolation, showing his brief encounter with a mysterious businessman, Shen (Chen Daoming), and his deepening bond with his psychiatrist, Dr. Lee (Kelly Chen).
In a tragic twist of psychological displacement, Lau begins to hallucinate, projecting the identity of the virtuous, deceased Chan Wing-yan onto himself, while viewing his rival, Yeung Kam-wing, as the villainous Hon Sam mole. Andy Lau delivers a masterclass performance, capturing the agonizing desperation of a man whose mind is cannibalizing itself under the weight of unconfessed sins. Themes of Buddhist Karma and Eternal Torment
Infernal Affairs III is not a sequel. It is a psychological autopsy. It is a deliberate descent into madness disguised as a police thriller. To understand why this film is a secret masterpiece, one must first abandon linear thinking and embrace its fractured, tormented soul.
Released on December 12, 2003, less than a year after the original, Infernal Affairs III was a commercial event, grossing over $4.4 million USD worldwide, and was part of the trilogy that helped reinvigorate a struggling Hong Kong film industry . Under the direction of Andrew Lau and Alan Mak, the film brought back the entire ensemble cast—Andy Lau, Tony Leung, Kelly Chen, Anthony Wong, and Eric Tsang—and added new stars Leon Lai and Chen Daoming, ensuring it was a tentpole release . But beneath the surface of a commercial hit lies a provocative, high-stakes experiment in storytelling and psychological horror. Infernal Affairs III
The film is notable for reuniting the "Four Kings" of Hong Kong cinema and introducing powerhouse mainland talent.
Taking place ten months after Yan’s tragic death, this timeline follows Lau Kin-ming (Andy Lau), the triad mole who successfully infiltrated the Hong Kong Police Force. Though Lau has killed his triad boss and survived internal investigations, he is trapped in his own mental purgatory. Desperate to erase his criminal past and become a "true" good cop, Lau becomes obsessed with a ruthless rising star in the force, Security Wing Superintendent Wing (Leon Lai), whom Lau suspects is another triad mole.
The film famously weaves together two distinct time periods to bridge the gaps in the trilogy's timeline:
The ensemble cast remains a major attraction. Andy Lau reprises his iconic role as the mole-turned-cop Lau Kin-ming, joined by returning cast members Tony Leung Chiu-wai as the late undercover officer Chan Wing-yan, Kelly Chen as therapist Lee Sum-yi, Anthony Wong as Superintendent Wong Chi-shing, Eric Tsang as triad boss Hon Sam, and Chapman To as Keung. New to the trilogy are Leon Lai as the enigmatic Inspector Yeung Kam-wing and Chen Daoming as the mysterious businessman Sam, a shrewd box-office calculation that adds significant star power to the trilogy’s concluding chapter. The trilogy's monumental legacy is perhaps most visible
"God wants him to perish, so he first drives him mad." This ancient proverb, referencing the madness of an idealist besieged by a corrupt world, lies at the thematic heart of the original Infernal Affairs . Yet, it serves as an even more fitting epigraph for its conclusion: Infernal Affairs III (2003). This final installment, a cinematic puzzle box that is both a sequel and a prequel, eschews the taut cat-and-mouse game of the first film for something far more ambitious and unsettling. It plunges its surviving protagonist not into the physical world of shootouts and wiretaps, but into the deepest, darkest depths of a fractured psyche, making it a daring and essential, albeit flawed, masterpiece.
The supporting cast is equally impressive, with standout performances from Anthony Wong as the ruthless triad boss, Sam, and Eric Tsang as the seasoned police officer, SP Wong. The character development is impressive, with each actor bringing their own unique energy to their respective roles.
While it may not have achieved the same unanimous critical acclaim as the first, Infernal Affairs III is essential viewing for fans, offering a psychological deep dive into the cost of living a double life. A Complicated Narrative: Pre- and Post-Fate
The film’s narrative is split across two distinct timelines, bridged by the presence of Inspector Lau Kin-ming (Andy Lau). But the crucial difference lies in the third act
If you are a fan of psychological thrillers and complex storytelling, is a rewarding watch that completes the trilogy's exploration of identity and moral ambiguity. Infernal Affairs III Tickets & Showtimes | Fandango
In the past, Yeung investigates Chan Wing-Yan. He doesn’t trust the young, reckless undercover cop. He pushes him, tests him, almost breaks him. But in doing so, he inadvertently solidifies Chan’s resolve. Yeung is the impossible standard: a cop who is truly incorruptible, utterly silent, and lethally effective.
However, the film is not without its flaws. Some viewers may find the narrative twists and turns a bit predictable, and the supporting characters feel somewhat underdeveloped. Additionally, the film's climax, while visually stunning, feels a tad rushed.