The Boy Who Knew Too Much/Appearances

Characters
Characters making a first appearance in this episode are:
 * Freddy Quimby

Other characters:
 * Bart Simpson
 * Lisa Simpson
 * Otto Mann
 * Milhouse Van Houten
 * Wendell Borton
 * Lewis
 * Edna Krabappel
 * Sherri and Terri
 * Martin Prince
 * Seymour Skinner
 * Groundskeeper Willie
 * Homer Simpson
 * Joe Quimby
 * Clancy Wiggum
 * Rainier Wolfcastle
 * Marge Simpson
 * Eddie
 * Lou
 * Scott Christian
 * Kent Brockman
 * Maggie Simpson
 * Hans Moleman
 * Helen Lovejoy
 * Apu Nahasapeemapetilon
 * Ned Flanders
 * Jasper Beardley
 * Patty and Selma Bouvier
 * Lionel Hutz
 * Moe Szyslak
 * Julius Hibbert
 * Itchy &amp; Scratchy
 * Barney Gumble

Locations

 * 742 Evergreen Terrace
 * Springfield Elementary School
 * Springfield Natural History Museum
 * Aztec Theater
 * Springfield Auction House
 * Springfield Palace Hotel
 * Springfield County Courthouse

Vehicles

 * School Bus