Uncle Grandpa is an American animated television series created by Peter Browngardt. The series ran on Cartoon Network from September 2, 2013 to June 30, 2017. It is based on Browngardt's animated short of the same name from The Cartoonstitute. Uncle Grandpa is also a spin-off of Secret Mountain Fort Awesome, which was in turn a spin-off of the Cartoonstitute short. It is produced by Cartoon Network Studios.
The show is a surreal action-adventure comedy that relies extensively on visual gags and catchphrases. Creator Pete Browngardt has cited the work of cartoonists Don Martin, Gary Larson and Robert Crumb, as well as Golden Age-era animators such as Tex Avery when it came to developing the style of the show. Each 11-minute episode is presented in a unique format, consisting of a main seven- to nine-minute story, some short bumpers typically composed of a quick visual joke, and an original short that focuses on the show's side-characters. The first 2 seasons received generally negative reviews but became more positive starting in the third season.
With a ploy, Cartoon Network renewed the series for the fourth and fifth seasons: first splitting the second season (of 52 episodes) into two halves, which respectively became the second and third season, then also dividing in half the already announced third season. With the fourth season composed of 26 episodes and the fifth season composed of 23 episodes, these new seasons are the final. The series concluded on June 30, 2017.