Billy's Growth Spurt (S01E18)
S01E18
Billy indulges in too much junk food, which leaves him feeling ill. To help, Grim concocts a remedy based on his grandmother's recipe, but instead, it causes a parasite to develop on Billy's back, which he whimsically names Yap-yap. As they continue their junk food binge, Mandy suggests using the antidote to counteract the original remedy. Eventually, Yap-yap, now resembling a mini Billy, separates from him, trying to escape the antidote. Ultimately, Yap-yap consumes the antidote, leading to his demise and freeing Billy from the unwanted guest.
Show
I Was Bitten
Episode
S01E18
Air Date
Oct 04, 2002
Season 1 Episodes
S01E01
Effects of venom on the body
S01E01
Meet the Reaper
S01E02
Episode 2
S01E02
Skeletons in the Water Closet
S01E03
Most Extreme Bites
S01E03
Opposite Day
S01E04
Look Alive!
S01E04
Danger can lurk in one's backyard
S01E05
A woman is mauled by a tiger
S01E05
Mortal Dilemma
S01E06
Episode 6
S01E06
Get Out of My Head!
S01E07
Fiend Is Like Friend Without the 'R'
S01E08
Recipe for Disaster
S01E09
A Dumb Wish
S01E10
Grim vs. Mom
S01E11
Tastes Like Chicken
S01E12
Grim or Gregory?
S01E13
Something Stupid This Way Comes
S01E14
A Grim Surprise
S01E15
Beasts and Barbarians
S01E16
Hoss Delgado: Spectral Exterminator
S01E17
To Eris Human
S01E18
Billy's Growth Spurt
S01E19
Billy & the Bully
S01E20
Big Trouble in Billy's Basement
S01E21
Tickle Me Mandy