This smart, involving sci-fi picture, set in an Ohio high school, pays homage to several genre faves, notably Invasion of the Body Snatchers and The Thing, but also The Breakfast Club, with peer group pressure and disaffected teens rebelling against 'alien' adult authority figures. The neatly worked scenario pits a disparate group of Herrington High students against teachers who've been transformed by an alien parasite into smily, emotionless drones. Forced to work together, the kids put aside their differences, using their newly discovered collective strength to fight the common foe. But since affected humans show no outward signs of having been 'turned', even this tightknit group is riven by suspicion and paranoia. Rodriguez opts for a slow build-up, using John Carpenter style framing and fluid camera movements to generate creepy suspense, before pushing in close to engage with the threatened teens. Vastly superior to other teenage horror flicks.