The everyday life of Arnold, a 4th-grader in a nameless city that resembles Brooklyn, New York, who lives in a multi-racial boarding house with his grandparents and a motley assortment of neighbors and friends.

Helga: [From the intro] Move it, football head!
[Censored Line as he is about to be denied entry of the Tunnel of Love]
Sid: What, because I'm short means I can't get no action!
[repeated line]
'Big' Bob Pataki: [scolding] Hey-Hey-Hey-Hey-Hey!
[repeated line, usually after Helga screams so loud because she's afraid her secret is going to get out]
Arnold: Did you hear something?
Gerald: No, I didn't hear anything.