High Quality Content by WIKIPEDIA articles! Hey Arnold! is an American animated television series created by Craig Bartlett for Nickelodeon. The show`s premise focuses on a fourth grader named Arnold who lives with his grandparents. Episodes center on his experiences navigating big city life while dealing with the problems he and his friends encounter, including urban legends. Certain episodes focus on the lives of supporting characters, such as the tenants of the boarding house that Arnold`s grandparents own.