 The air date of this episode, which involves deaths on a college  campus, was pushed in the wake of the tragic mass shooting at  Virginia Tech on April 16th, 2007. Incidentally, this happened to  star David Boreanaz almost exactly eight years earlier when an  episode of Buffy the Vampire Slayer titled "Earshot," which involved  a school shooting plot, was postponed following the tragedy at  Columbine High.