Fans of TV's The X-Files are the main audience for this theater-screen extrapolation of the paranormal-paranoia one-hour chiller. Dovetailing with a long, complicated saga threading in and out of TV episodes, THE X-FILES: FIGHT THE FUTURE finds FBI investigators Fox Mulder (David Duchovney) and Dana Scully (Gillian Anderson), formerly running a special branch devoted to the weird and supernatural, now demoted to "routine" police work -- like a mammoth terrorist explosion leveling a government building in Dallas. Mulder, however, learns the bombing was a diversion, to destroy evidence that an extraterrestrial virus had been unearthed from its Ice Age cave nearby and is infecting humans. Apparently space beings, aided by a worldwide conspiracy of elite human traitors, have been slowly colonizing Earth for many years. But thanks to the vicious monsters produced by the virus, the process now looks less like a peaceful Invasion of the Body Snatchers infiltration and more of a grisly Alien massacre -- unless Mulder and a slightly disbelieving Scully can expose the plot before it's too late.