History Fridge / HeyArnold

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* The fifth grader Wolfgang is much bigger than the fourth graders, despite being a year older than them. It's possible he's been held back a couple years, like Torvald, hence why he's bigger.

* In "Arnod's Hat", Arnold sinks into a deep depression and feels incomplete without his hat. A flashback shows his parents giving him the hat when he was a baby, [[spoiler:and later, we learn that Arnold's parents have been missing in action since he was a baby, and just how much he misses them. He probably didn't realize at the time that's the main reason he felt all wrong without the hat!]]

* The series takes on a new life if you look at Helga as the main character and Arnold as the DecoyProtagonist. ''The entire show'' could be her trying to get his attention.

* When Phoebe is hall monitor, she begins giving detentions left and right, but apparently Gerald got it worse. She is doing exactly the same as Helga, bullying the boy she likes.

* In "Arnod's Hat", Arnold sinks into a deep depression and feels incomplete without his hat. A flashback shows his parents giving him the hat when he was a baby, [[spoiler:and later, we learn that Arnold's parents have been missing in action since he was a baby, and just how much he misses them. He probably didn't realize at the time that's the main reason he felt all wrong without the hat!]].

* The name of the teacher of the manners school that Patty and Rhonda attended in one episode is "Madame Parvenu". A parvenu is someone who is trying to adapt themselves to society while denying their origins (usually more humble, since the term is usually used to describe new riches, but it has been used on other ways, it was used first to descrive Jewish women who married to Christian men to be socially accepted). The fridge comes when that's what both girls tried to do, deny her more brash natures (that are also present in their families) and trying to be more delicate in order to fit into society.

* Helga has been shown to be jealous of any other girl Arnold has a crush on, but she seems to be especially jealous of Lila, even though Lila only likes Arnold as a friend. In the episode “Arnold & Lila”—the episode in which it is shown how Arnold’s crush on her began—reveals that Helga herself is mostly responsible for it, as she nervously changed a written message from “Arnold loves Helga” to “Arnold loves Lila” and the girls who saw it, including Lila who happened to be there, thought Arnold wrote it. It’s possible one of the reasons Helga is so jealous of Arnold crushing on Lila is because it’s mostly her own fault. Basically, Helga is trying to end what she started.
* Although Arnold has made it clear to Lila that he has a crush on her, Lila only likes him as a friend. In many episodes, Arnold tries unsuccessfully to get Lila to like-like him. In the episode “School Play” Lila got Helga to confess that SHE loves Arnold. One of the reasons Lila continues to only like Arnold as a friend may be because she knows Helga loves him.

* "Mr. Green Runs" is a rather interesting episode when one thinks about it. From a [[SurprisinglyRealisticOutcome realistic]] viewpoint, it shouldn't make sense for a butcher to run for mayor, even with the best of meat allegories. But that's before one realizes the purpose of being mayor: to be a ''public servant''. The people are easily drawn in my Mr. Green's allegories about meat because they know he's a good butcher ''who serves his customers well''. If they can count on him to deliver good meat, it's a rather promising indication they can count on him to serve the people well.
* Why is Helga so disgusted with Rhonda when she dumps Curly in public? She understands Curly as she feels the same way about Arnold as he did for Rhonda. The break-up probably really hit home for her. Arnold doing that to her would destroy her so she understands how cruel it was of Rhonda.

* It's apparent Oskar Kokoshka and his wife Suzie are only married so he can stay in the United States. In "Gerald Comes Over" when Suzie and Oskar are arguing, she says she should have listened to her mother caused she tried to warn her (probably of Oskar's intentions). Later in the episode when everyone in the boarding house is at the dinner table Oskar says to Suzie "More soup my little green card?"

* In "Oskar Can't Read?" during one scene in Oscar's apartment we see their TV in the background and the screen is broken. Oskar and Susie do struggle financially, and this could be due to them fighting and Susie throwing things (like in "Arnold as Cupid" and "Gerald Comes Over")

* In "Helga on the Couch", Mr. Simmons gets nervous when he learns that the school psychologist will be observing his class, and wants to make sure she's observing the students and not him. WordOfGod says Mr. Simmons is gay, and he was afraid she might out him.

* The series takes on a new life if you look at Helga as the main character and Arnold as the DecoyProtagonist. ''WesternAnimation/HeyArnold'' could be her trying to get his attention.

* A couple episodes "Helga and the Nanny" and "The Beeper Queen" shed light on the problems Miriam's alcoholism have caused. In the former Bob mentions she'll be late for her community service job, and he hires a nanny to take care of things while she's away. In the latter Arnold asks if she's gotten her license back. It's implied here she has a DUI, and she got it prior to "Helga and the Nanny." She still hadn't gotten her license back by the time "The Beeper Queen" aired, hence Arnold's comment.
* Why does Grandpa Phil badmouth Arnie in "Weird Cousin"? Arnie's not his grandson. Arnie has the same football shaped head Arnold has, and anytime we've seen Arnold's mom she has the same shaped head Arnold has. He's a cousin on his mother's side, and Phil is Arnold's ''paternal'' grandfather (i.e. from his father's side).
* So we have the episode "Hookey", wherein Arnold and Gerald play hookey from school, have a miserable day, and return to school to find that there was a "surprise carnival day" at school. Early on in the episode, Arnold and Gerald were discussing hookey and Principal Wartz accuses them of planning to play hookey. The boys insist they were talking about ''hockey''. Perhaps Wartz knew Arnold and Gerald were lying and pretended to believe that they were indeed talking about hockey, later planning the surprise carnival day to teach them a lesson.
* In one episode, Helga tells Olga that the bow that Olga thought was "new" was the same bow Helga's been wearing since she was three years old. Helga's bow is the first thing that Arnold mentioned when he showed interest in Helga during their time together in preschool, so she's worn it ever since because she knows Arnold likes it.