Starring: Mark Wahlberg , Michael Pena, Danny Glover, Ned Beatty Director: Antoine Fuqua The film: A wronged hero tries to put things right in Antoine Fuqua's ultra-violent foray into Rambo's well-trodden undergrowth. The lead character is named Bobby Lee Swagger and once you get over giggling at that, you'll find similar themes in both films. Disillusioned military man. Betrayal by the government. You'll soon get the picture. And while - initially at least - the film draws you in, Fuqua throws in so many twists that you're left unsure who's betraying whom. That's surprising from the man who made 2001's Training Day such a successful exercise in how to put together a taut thriller. Here, when the storyline begins to fray, the director simply ups the violence quota, explodes a few heads, and hopes we won't notice the film's weaknesses. Mark Wahlberg showed in The Departed that he can add surprising depth to his characterisations, if the need arises. Sadly, as Swagger, he's running on empty. He's the military's top sharp shooter who loses faith and retreats into the wilderness - but is drawn back into action when his nation comes a callin'. But all is not what it appears to be - he's betrayed and forced to go on the run. And then all hell breaks loose. There's a nice line in conspiracy theories, but it runs out of stream shortly after the world turns against the lone gunman. The trick with characters of this ilk is that you have to see something about them that you like. Rambo was, after all, Rocky in fatigues - and so was able to give a good tug on the heart strings. Wahlberg (right with Michael Pena) is more sneering than sympathetic and very hard to warm to. What's disappointing is that Fuqua loses his plot and, frightened perhaps by the mess he's building around himself, opts for violence at the expense of everything else. Not even quaint cameos from Danny Glover and the ever-reliable Ned Beatty can help save the day. You're left with an astonishing body count - and a movie that overstays its welcome. The extras: Surprisingly, for a man whose films pack such a punch, Fuqua's commentary lacks any spark at all - no matter how hard he tries to convince you of the pains he went through to make the film as authentic as possible. There's action value in the deleted scenes - but their inclusion would have pushed any audience's tolerance for violence to breaking point. The surprise, then, is that the obligatory making-of featurette actually gives some decent insights into the production and the often-shielded personality of its star. There's also a routine profile on the production's military adviser. The verdict: Lots of bang for your buck, but you'll be left feeling uncomfortable - and more than a little soiled - afterwards.