Earth's in peril, yet again, and the US President must call the shots. This time, though, we're rooting for the space invaders. Tim Burton's film is the most subversive big-budget Hollywood production in years, a splenetic satire which gleefully trashes contemporary culture - politics, science and religion, the army, TV, food, music, even money. Unfortunately, it's not very good. The tacky design undoubtedly cost a fortune, and there's a real perversity in casting superstars to ham it up in homage to Ed Wood. The anarchy is sometimes inspired (Burton incinerates Congress, movie stars and doves with equal abandon - he loves playing Godzilla), but much of the film is flat and cripplingly indulgent. It feels nearly half an hour too long, and Nicholson, in a double role, is just too much. It's a personal work, but not a mature one. It didn't hit home at the US box-office, but the reviews have been surprisingly accommodating. In that sense, this sour, prefabricated cult movie has the last laugh - and I'm afraid the joke's on us.