"Germ Warfare" is the thirty sixth episode of the fourth season of which was first broadcast on February 29, 2000.
Gus and Mikey are at war after Gretchen catches a cold.
This episode marks the first time a member of the gang is shown sick from school for a majority of the episode, this one being Gretchen. T.J. was mentioned to be sick for a week at the begining of " Economics of Recess", however this was before the events of the episode.
This episode was cut in the Italian dub.
This episode shares the same title as an episode of Dinosaurs, also produced by Walt Disney Television.
This episode is similar to the Hey Arnold! episode, "Sid and Germs."
T.J. Detweiler - Andrew Lawrence
Vince LaSalle - Rickey D'Shon Colins
Ashley Spinelli - Pamela Segall-Adlon
Gretchen Grundler/Ashley Tomassia - Ashley Johnson
Mikey Blumberg - Jason Davis
Gus Griswald - Courtland Mead
Miss Finster - April Winchell
Ashley Armbruster/Kid #3/Kid #5 - Anndi McAfee
Ashley Boulet - Francesca Smith
Ashley Quinland - Rachel Crane
Hustler Kid - Michael Shulman
Menlo - Blake Ewing
Earwin Lawson - Erik von Detten
Gordy - Sam Gifaldi
Kid #1 - Klee Bragger
Kid #2 - Kath Soucie
Kid #4 - Justin Shenkarow
Kid #6 - Aria Noelle Curzon
Man - Gregg Berger