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.
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Sheep Deprivation Trash Cat Uncle Grandpa's Odd-yssey Surprise Party Late Night Good Morning with Uncle Grandpa New Direction Anger Management More Director Shorts Cartoon Factory What's the Big Idea? Chess Master Steve Uncle Greedpa Pizza Steve's Past Diggin' a Hole Broken Boogie Uncle Grandpa's Uncle Grandpa Transitional Phase Date with Gus Full Grown Pizza High Dive Tiny Miracle's Tiny Miracle Exquisite Grandpa Uncle Grandpa: The High School Years
Sheep Deprivation Trash Cat Uncle Grandpa's Odd-yssey Surprise Party Late Night Good Morning with Uncle Grandpa New Direction Anger Management More Director Shorts Cartoon Factory What's the Big Idea? Chess Master Steve Uncle Greedpa Pizza Steve's Past Diggin' a Hole Broken Boogie Uncle Grandpa's Uncle Grandpa Transitional Phase Date with Gus Full Grown Pizza High Dive Tiny Miracle's Tiny Miracle Exquisite Grandpa Uncle Grandpa: The High School Years
Uncle Grandpa - Season 5 Episode 23 Uncle Grandpa: The High School Years
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