Dr. Hibbert/Thomas

Cast

 * Dr. Hibbert as Thomas
 * Timothy Lovejoy as Edward
 * Luigi as Henry
 * Snake Jailbird as Gordon
 * Mr. Burns as James
 * Kirk Van Houton as Percy
 * The Sea Captain as Toby
 * Kreany & Dolph as Donald & Douglas
 * Shelley as Oliver
 * Moe as Diesel
 * Nelson & Jimbo as Bill & Ben
 * Marge as Daisy
 * Lisa as Mavis
 * Homer as BoCo
 * Edna Krapple as Emily
 * Lou as Bertie
 * Grandpa Abe as Salty
 * Rod & Todd Flanders as Arry & Bert
 * Sideshow Mel as Skarloey
 * Jasper as Rheneas
 * Professor Frink as Peter Sam
 * Principal Skinner as Diesel 10
 * Lenny & Carl as Splatter & Dodge
 * Eddie as Terence
 * Wendell as Trevor
 * Bart as Derek
 * Cecil as Geroge
 * Lyle as Spencer
 * Frank Grimes as Scruffy
 * Allison Taylor as Rosie
 * Sideshow Bob as Smudger
 * Frank Grimes Jr. as The Spitefull Breakvan
 * Superintendent Chalmers as D261
 * Barney Gumble as Dennis
 * Shreii & Terri as Bash & Dash
 * Rainer Wolfcastle as Norman
 * Martin as Paxton
 * Chief Wiggum as Sidney
 * Brandine as Millle