This is a serious film and will make you think. It asks more questions that it answers and does a pretty good job of setting up "Alien". David was creepy and had his own "agenda". Why did he infect the one dude? Elizabeth Shaw and Vickers kicked butt. The evolution of the alien made me cringe a couple of times. Pay attention to the opening scene and don't see this film if your expecting a "Men in Black III sci fi movie.