Hey Arnold! Season 4 Episode 15 Back to School ( Air Date 1999-09-11 ) Genre Animation, Comedy, Drama, Family category. Overview "After Grandpa tells Arnold that he never got his grade school diploma, Arnold convinces him to come to go back to school at P.S. 118.".
Hey Arnold! Season 4 Episode 15 Back to School
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- Watch: Hey Arnold! Season 4 Episode 15 Back to School on CWR-CRB
- Stars: Spencer Klein, Francesca Marie Smith, Jamil Walker Smith, Olivia Hack, Anndi McAfee, Justin Shenkarow, Blake McIver Ewing, Dan Castellaneta
- Director: Francesca Marie Smith, Gábor Csupó, Craig Bartlett, Jim Lang
