High Quality Content by WIKIPEDIA articles! The fifth season of American animated television series Adventure Time, created by Pendleton Ward, originally aired on Cartoon Network in the United States. The series is based on a short produced for Frederator`s Nicktoons Network animation incubator series Random! Cartoons. After the short became a viral hit on the internet, Cartoon Network picked it up for a full-length series that previewed on March 11, 2010, and officially premiered on April 5, 2010. The series follows the adventures of Finn, a 14-year-old human boy, and his best friend Jake, a dog with magical powers to change shape and grow and shrink at will. Finn and Jake live in the post-apocalyptic Land of Ooo.