After Uncle Grandpa gets very outraged with how his day has been, Aunt Grandma arrives to make it worse; Uncle Grandpa must try to calm down before he's erased from existence by a rage judge machine.

Uncle Grandpa visits the cartoon factory to get some answers about his roots. (Pete Browngardt stars as a cartoon version of himself.)

Uncle Grandpa wakes up from a night terror, so he goes to the "one who knows all", who is a mustache man he finds on another planet. Before receiving his help to stop night terrors, he ends up telling him all the dreams he had leading up to the nightmare he woke up from.

In the series finale that's a flashback that shows the gang in high school, Uncle Grandpa, Pizza Steve, Mr. Gus, Tiger, Frankenstein and Belly Bag are all in detention and while the principal is using the bathroom, they all try to find ways to fight boredom and slowly start to build a friendship. After a fight, they all make up and Uncle Grandpa suggests they all live together and have fun adventures later on in the RV.