|Season 02, Episode 07|
|Air Date||October 31, 1998|
|Next||Gretchen and the Secret of Yo|
A Mysterious Substitute by the name of Mr. E takes over Miss Grotke's class while she is away.
- Mr. E 's name sounds like the world "Mystery".
- Dave is voiced by Klee Bragger in this episode.
- T.J. uses the word "Whomp" for the first time in this episode.
- This is the first episode written by Phil Walsh.
- T.J. Detweiler - Andrew Lawrence
- Vince LaSalle - Rickey D'Shon Collins
- Ashley Spinelli - Pamela Segall-Adlon
- Gretchen Grundler - Ashley Johnson
- Mikey Blumberg - Jason Davis
- Gus Griswald - Courtland Mead
- Miss Finster - April Winchell
- Miss Grotke - Allyce Beasley
- Principal Prickly - Dabney Coleman
- Dave/Phil - Klee Bragger
- Ashley Armbruster - Anndi McAfee
- Ashley Boulet/Swinger Girl - Francesca Smith
- Ashley Quinlan - Rachel Crane
- Clyde Philmore - Erik von Detten
- Mr. E. - David Rasche