For all of us who thought our teachers were aliens, here's the film that proves us right. A queen alien in human form has infiltrated a US high school; in no time the staff are in its clutches. 'Gee,' gasps our teenage hero (Elijah Wood), 'it took the school in an hour and a half.' Seems like the only way to tell the aliens is by making people sniff cocaine - which makes the aliens fall apart. But if the queen is one of the crusading sextet of students, why doesn't she just take the rest over? That, though, might rob us of the final transformation scene: here come those tired old tentacles again as the big baddie turns into a big bad bug. Been here, done this. Sad to see Scream writer Kevin Williamson running out of plots already.