"Weapons of Class Destruction" is the eighteenth episode of the first season of the American mystery television series Veronica Mars. Written by Jed Seidel and directed by John Kretchmer, the episode premiered on UPN on April 12, 2005.The series depicts the adventures of Veronica Mars (Kristen Bell) as she deals with life as a high school student while moonlighting as a private detective. In this episode, Veronica investigates the persistent bomb threats at her school.