Infernal Affairs Iii

Many viewers mistake Lau’s arc for simple guilt. It’s much darker. Lau is suffering from dissociative identity disorder (a form of split personality) brought on by traumatic brain injury and extreme psychological stress.

Infernal Affairs III introduces two key foils. First, Leon Lai’s Superintendent Yeung. Lai, with his placid, inscrutable face, plays the perfect anti-Lau. Where Lau schemes, Yeung observes. Where Lau panics, Yeung waits. He is not a villain but a disruptor—a man who represents the unbribable system that Lau believes he has fooled.

Second, and more controversially, is mainland actor Chen Daoming as the triad boss “Bosch.” While some saw his role as extraneous, Bosch serves a critical function: he is the past that refuses to stay buried. He knows the old Lau. He is a walking contradiction to Lau’s new identity. Every scene between Lau and Bosch crackles with the tension of a man trying to outrun his own biography.

Infernal Affairs III was initially criticized as convoluted. But over time, it has been reassessed as a brave, experimental conclusion. It is not an action film; it is a psychological horror movie disguised as a police thriller. Infernal Affairs III

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The film was a commercial success, grossing over HK$47 million (US$6 million) at the Hong Kong box office.

Infernal Affairs III has had a significant impact on Hong Kong cinema, influencing a generation of filmmakers. The film's success has also led to a renewed interest in Hong Kong cinema globally. Many viewers mistake Lau’s arc for simple guilt

Infernal Affairs III splits itself into two intercut strands:

This structure intentionally blurs chronology and perspective—scenes overlap with earlier films, and new footage recontextualizes past actions. The result is less a linear narrative than a palimpsest: the past never fully lets go.

Warning: Spoilers for Infernal Affairs I ahead. Yeung Kwun is killed by Lau

The first film ended with the death of undercover cop Chan Wing-Yan (Tony Leung) and the unmasking of triad mole Lau Kin-Ming (Andy Lau). Infernal Affairs III picks up 16 months after that event.

Yeung Kwun (Leon Lai) is the film’s red herring. He appears cold, calculating, and suspicious. But his role is tragic: he is another undercover cop, inserted into the Police Complaints Division to root out corrupt officers. He is not hunting Lau for being a mole; he is hunting Lau for the murder of SP Wong (from the first film).

By the end, Yeung Kwun is killed by Lau, making him yet another innocent cop sacrificed to protect a lie.