Lisa's Date with Density/Appearances

Characters
 * Seymour Skinner
 * Superintendent Chalmers
 * Kearney Zzyzwicz
 * Homer Simpson
 * Apu Nahasapeemapetilon
 * Chief Wiggum
 * Groundskeeper Willie
 * Bart Simpson
 * Nelson Muntz
 * Lisa Simpson
 * Milhouse Van Houten
 * Marge Simpson
 * Mr. Burns
 * Dewey Largo
 * Janey Powell
 * Uter
 * Abraham Simpson
 * Jasper
 * Snowball II
 * Professor Frink
 * Dolph
 * Jimbo Jones
 * Ned Flanders
 * Maude Flanders
 * Agnes Skinner
 * Officer Lou
 * Officer Eddie