When Los Angeles starts blowing off a little more steam than usual, it falls to disaster emergency supremo "Rourke" (Tommy Lee Jones) to find out what is going on - and when that turns out to be an impending volcanic eruption, he enlists the help of "Dr. Barnes" (Anne Heche) to stop it destroying the city. To be fair, there are plenty of great pyrotechnics and the film pretty much starts in fourth gear - but the ending really lets it down. Not the science, that's quite entertaining as they have to use subway tunnels, storm drains and quite a bit of dynamite; it's the "have to rescue my…