Goof: The dental hygenist's hair changes color from red to brown.
In "Helga Blabs It All," when she is jumping for the exit through the vents with the rope, she swings, hits her face, falls down onto Arnold's couch, and flips into Arnold's room. But in the parrot episode, when Helga is hiding in Arnold's room, she gets stuck in the couch, and there is no exit.
When Mr. Green tells Harold he's done working for him, the Green Meats logo on his apron is green instead of white.
Mr. Green: Harold Berman, I can't believe my eyes, you stole my beautiful ham! And now it's ruined!
Harold: Aw, I was hungry! I was really, really hungry!
Mr. Green: That doesn't give you the right to steal from people! You understand that?
Harold: NOOOOO!!!! MOMMY!!!!!!!!
Mr. Green: I'm gonna have to call his mommy.
Helga: Boy, I'm feeling goofy. You know, this Arnold guy, he's been on my mind morning, noon, and night for the past six years. I mean, think about it, since I'm currently nine years old, that is fully two-thirds of my young life. Is that crazy or what?
Arnold's Grandma misreads Helga's name as "Helen of Troy", a name from Greek mythology.
Harold's parents' first names (Jerry and Marilyn) are mentioned for the first time.
This is the first time we see the guy who hates being called.
Episode Title: Helga Blabs It All
The episode title "Helga Blabs It All" is a parody of Clarissa Explains It All, a 1990's Nickelodeon show.
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