Watch Hey Arnold Online for free at CouchTuner. The adventures of a daydreaming, jazz-loving, football-headed 9-year-old, who lives in a boarding house with his grandparents and some eccentric boarders, encounters life in the city with his best friend Gerald, a loofah-haired kid, who is the keeper of the urban tales and coolest kid in class; and Helga, who torments him, but loves him secretly.