The Halifax siblings are on a mission to hunt down a murderous alien from outer space.  Saving the world is hard, though, when you're just trying to get through high school.  A teen Doctor Who meets Buffy the Vampire Slayer, Halifax follows Farrell, Izzy and Rom as they battle killer aliens, infected cheerleaders and clueless teachers to try and make the world a safer place.  Algebra, gossip and cheerleaders are bad enough.  It's the killer aliens you really have watch out for.