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Watch Hey Arnold! Season 3 full episodes online free watchcartoononline.
Synopsis: Young Arnold lives with his grandparents in the city of Hillwood. The fourth grader with a football-shaped head takes on adventures to help solve classmates’ problems or come up with solutions to his own predicaments. Arnold often tackles the incidents with best friend Gerald, who tries to be the voice of reason. Young Helga is often mean to Arnold after all, she’s the school bully but secretly has a crush on him. The animated series lasted for five seasons in its original run, then prompted a 2002 movie.