When Mr. Gus and Pizza Steve's prank calling lands them in an intergalactic prison, they must work together to escape.

Aunt Grandma is back and still bent on ruining Uncle Grandpa

The gang must stop a nefarious imposter from rendering Uncle Grandpa obsolete.

When UG helps a little girl who is afraid of the dark, he convinces her there's nothing to be afraid of but their imaginations.

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.

Legendary rock band, the Melvins team up with Uncle Grandpa to help a young girl who wants to win her school's talent show.

Upon seeing the gang have a fun time swimming and eating ice cream, Tiny Miracle realizes he wants to be a real boy.

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.

Uncle Grandpa goes to great lengths to meet Pizza Steve's imaginary friend.

Pizza Steve and Mr. Gus compete in the RV Olympics.

Pizza Steve's jealousy ruins Uncle Grandpa's Dinosaur Day celebration for Mr. Gus.

Uncle Grandpa builds a robot version of himself to help with his duties.

Uncle Grandpa and Pizza Steve help Mr. Gus try to get his face back to normal before an important photo shoot.

Uncle Grandpa hates going to the doctor, but he's overdue for an important vaccination.

Uncle Grandpa and the gang learn of Pizza Steve's past stunt in the foodservice industry; Pizza Steve wasn't always the Pizza Steve they know and love.

Uncle Grandpa and Pizza Steve run against one another in the RV presidential race.

Mr. Gus moves out of the RV and Uncle Grandpa and Pizza Steve try to get him back.

Uncle Grandpa and a kid embark on a dangerous jungle adventure in search of a legendary MacGuffin.

Uncle Grandpa makes improvements to a kid's Halloween costume.

A failing little league team on the brink of giving up gets help from UG and some Major League Baseball players.

Uncle Grandpa takes a kid to the North Pole for an epic snowball battle.

Pizza Steve desperately tries to prevent the gang from finding out his shameful secret.

Uncle Grandpa hosts a talk show featuring bands such as Mr. Gus and the Jurassic Jam, Giant Realistic Flying Rock Band and an appearance by Pizza Steve and a talking baloney sandwich.

Pizza Steve goes to great lengths in order to beat Mr. Gus at a game of chess.

Uncle Grandpa and Pizza Steve try to convince Mr. Gus that his ventriloquist dummy is alive.