INFERNAL AFFAIRS II is a prequel to the smash-hit movie about undercover operatives and their parallel lives in the Hong Kong police and Triads. This one explores the early lives of the characters played by Tony Leung and Andy Lau in the original, the actors replaced by newcomers Shawn Yue and Edison Chen respectively (Yue and Chen had bit parts in INFERNAL AFFAIRS).The problem with this prequel is that it feels hurried and unnecessary, lacking almost all the qualities that made the first film so good. Leung and Lau were engaging actors who brought subtle nuances to their roles, but Chen and Yue feel bland and too fresh-faced in comparison. Realising this, the film-makers spend a lot of screen time with rivals Anthony Wong and Eric Tsang instead, but you can't help feel but the plotting in this one is redundant in contrast to the life-or-death stakes of the gripping original.There's a distinct lack of emotional involvement in the film as the story develops, and although the technical qualities are strong, the twisty-turny plotting isn't. There are the requisite betrayals, executions and bombings, but they have a slightly tired quality to them. This isn't a bad film by any means, but it's one that's easily lost and indistinguishable during a decade in which Johnnie To made seemingly endless variants on similar themes.

Although this is the second film in the trilogy it is not necessary to have seen the first instalment to enjoy this, as it is a prequel. Set in the years leading up to the handover of Hong Kong from Britain to China we are shown how each of the protagonists from the first film got to where they were in that film. Of course this means we know that everything will work out for them; it doesn't mean this film is without its tense moments though as there are plenty of new characters; not all of whom survive. While the two main characters from the earlier film feature prominently it is their bosses who are the protagonists this time. We see how Triad member Sam rises to the top while most of his contemporaries and seniors end up dead and policeman Inspector Wong Chi Shing manages to advance despite being implicated in a murder several years previously.While this film missed the two main stars of the first film it was still well acted and the characters were just as believable. I had been worried that it would suffer from the problem that all prequels face; namely that anybody who has seen the first film will know who will survive, amazingly this managed to convince me that at least one character who I knew should have survived died; I assumed I'd been confused about who was who till we later learnt what had happened. There is plenty of action and anybody who enjoyed the first film is likely to like this too; I'd certainly recommend it to fans of action films in general and Hong Kong films in particular.

The directors mentioned that the reason behind making 'Mou gaan dou II' (aka 'Infernal Affairs II') was that they wanted to provide some background information and history on the first movie so that the viewers understand the situations better. However, having seen the first movie, I don't see why there was a need for a film about what happened before. Why does everything need to be explained? 'Mou gaan dou' was quite straightforward and as a stand alone it's an excellent action thriller. The prequel is a different genre. It's more a crime drama and it lacks the slickness, steady pace and coherency of the first film, not to forget Lau and Leung's strong performances. Most of the first hour painfully drags on. While 'Mou gaan dou' centred around Yan and Ming, 'Mou gaan dou II' is mainly about Sam, Wong and Hau (who play their leaders in the first film). Here Yan and Ming are merely supporting characters. Unlike in 'Mou gaan dou', here most of the performances are passable rather than great. Wong and Tsang do a fine job in the leading roles. In addition Ng does a brilliant job too. Lau's Mary appears to be too sketchy but she does well. Yet, even with the flaws, 'Mou gaan dou II' is not a bad film but rather an okay film because there are some noteworthy sequences especially towards the end where Hau meets his fate and Mary's murder.

Sequels are often a bad idea. If a second story is integral to our understanding of the first, it would have been included within it. Often, sequels seem like a cheap way to extract more life out of popular characters, by forcing the through fresh adventures which they either do not fit without contrivance, or which merely copy their previous escapades. 'Internal Affairs 2', however, is an exception. The first movie in this series was a complex thriller that was presented as the end game in a long battle between the Hong Kong police and criminal gangs; but the back story was only hinted at. This movie, actually a prequel, tells tells that story in such a way that it stands completely alone, and remains interesting although the audience already knows the ultimate ending; indeed, is arguably even more interesting because we know where the tale must end. One reason it works is because the film has different ambitions to its predecessor: that was a straightforward thriller of the highest order, whereas this film (no less good) is more character driven, and takes a wider perspective on Hong Kong society in general. Although the first movie was compared by some to Michael Mann's 'Heat', in fact it is this film that better bears the comparison as a tale of adversaries on opposite sides of the law, and it stands up to that comparison well: the subtle behaviours of the heroes and villains alike more interesting than the macho posturings of the gangsters and cops depicted in American movies. The only disappointment is the absence of Tony Leung from the original cast; but it's rare that two movies in a series are as complementary, and as good, as these two.