The series features a bizarre main cast that lives and travels together in the "UG-2000" robotic RV.
The absolute peak of the show’s cultural footprint occurred in 2015 with the crossover episode In a historic television event, Uncle Grandpa entered the universe of Steven Universe . The episode leaned heavily into the tonal clash between the two shows. Uncle Grandpa explicitly told the audience that his antics were "not canon," while helping Steven master his defensive shield. It remains one of the most celebrated and self-aware crossover episodes in modern animation. Why Uncle Grandpa Matters Today Uncle Grandpa Series