Humans have been colonizing on Mars for some time now.  Natasha Henstridge plays the role of Melanie Ballard, who is the captain of her police squad.  Ballard and her squad are sent to Mars in order to apprehend the criminal James "Desolation" Williams, played by Ice Cube.  While they are on the Red Planet, they discover that something is out there trying to get rid of the humans on that planet.  This thing gets inside the human's heads and takes control of them, turning them into a mindless hunter.  Soon Ballard and her crew discover that there is an entire army of these hunters in the planet and they are all after Ballard and her crew since they are the last humans left there.  Now Ballard must team up with Desolation Williams in order to save themselves from these creatures. I remember seeing the previews for the film some months back and I thought it looked really good.  But the theater around here didn't play it long enough for me to get the chance to see it, so I had to wait until it was released on video.  So when I watched it I noticed that it was a good scifi ...