Uncle Grandpa and the gang go undercover to taste the most sought after treat in the cosmos: the Taco Comet.

When Uncle Grandpa gets a watermelon stuck in his mouth, he is unable to ask for help and people interpret it as a comedy routine. As Uncle Grandpa's popularity rises, his friendships and morale suffer.

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

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.

After his underwear is stuck too tight, Uncle Grandpa calls upon the aid of HIS Uncle Grandpa, when that Uncle Grandpa fails, his Uncle Grandpa arrives, and things get out of control.