The six horrible Herdman children create mayhem during Halloween. Annotation. The Herdmans plus Halloween have always spelled disaster. Every year these six kids -- the worst in the history of Woodrow Wilson School, and possibly even the world -- wreak havoc on the whole town. They steal candy, spray-paint kids, and take anything that's not nailed down. Now the mayor has had it. He's decided to cancel Halloween. There won't be any Herdmans to contend...