"Hair" or "The Secret File of the Frenetic Follicles"
It all starts when the flea nation steals a truck load of the government's hair growth chemical. Ralph is contacted about the missing chemical. He then, using his high tech TV, finds that the fleas are aboard a blimp floating above the local baseball stadium during the big game. So Ralph, with the help of Scribble, Mitzy, Frank, and Angus' floppy foam hats, have to put a stop to the fleas evil plans of making the dirty, long haired, nail biting fans in to big fuffy balls of perfect living conditions for the fleas.
Other episodes for this season