Veronica Mars: Weapons of Class Destruction

After a number of fire drills go off at Neptune High, Veronica discovers the plot of a bomb threat, so she utilizes Mac and Wallace's help to determine which, if any, students might be a threat to school security. Meanwhile, Veronica is hit with a barrage of questions by Duncan about her involvement in figuring out his sister's death, and Keith reveals the mystery identity of his new girlfriend.