Oh Yuck!
Season 1, Episode 21: Oh Rats!
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When it's revealed that Durp-E is secretly keeping a pet rat in the Yuck Lab, everyone is shocked as to whom the cringing, shrieking aversion to them is.
All Episodes - Season 1
Episode 1
Snot Now, Snot Ever
Episode 2
Pimple Fever
Episode 3
Arachnattack
Episode 4
Dirty Rotten Birthday Girl
Episode 5
Fungus Humungus
Episode 6
Enter the Toothworm
Episode 7
Septico's Felonious Funk
Episode 8
That's So Fly
Episode 9
Gastrov Flatulinsky
Episode 10
Attack of the Yucky Plants
Episode 11
Urine Luck
Episode 12
Parasite Pirates
Episode 13
No Guts, No Glory
Episode 14
The Yuck Trifecta
Episode 15
Pristine Hair-Wolf
Episode 16
Kung Poo
Episode 17
Antpocalypse Now!
Episode 18
Yuck Lab Z
Episode 19
Roach Motel
Episode 20
The Big Stink
Episode 21
Oh Rats!
Episode 22
Everything's All-Mite!
Episode 23
Around the S Bend
Episode 24
Blisters and Shingles and Warts! Oh My!
Episode 25
All's Yuck That Ends Yuck Part 1
Episode 26
All's Yuck That Ends Yuck Part 2