AidanN

Factual error: When May finds out that Bob and Walter are conjoined twins, they are holding a Dunkin' Donuts bag. There are no Dunkin' Donuts in Los Angeles.

AidanN

Beaned / Old Iron Man - S5-E11

Continuity mistake: When Arnold reads to Helga, the book title says "GEO-" and "GRAPHY" (two words); the next day, it says "GEOGRAPHY" (one word).

AidanN

Stuck in a Tree / Rhonda Goes Broke - S5-E10

Revealing mistake: In the scene after the garbage dumpster scene, Buckley's lips disappear briefly while he's talking.

AidanN

Parents Day - S5-E6

Continuity mistake: In the scene where Arnold's parents leave for the last time, Grandma's hair is dark at first, then it becomes purplish-gray.

AidanN

On The Lam / Family Man - S5-E17

Character mistake: In the wrestling match, the bell rings after the referee counts to 3 - but he's counting while a wrestler is on the mat stomach-first; a pin requires the loser to be on his back.

AidanN

Parents Day - S5-E6

Continuity mistake: In the tricycle section of the last event, the chinpiece of Helga's helmet keeps switching colors.

AidanN

Continuity mistake: When Mike Teavee has been sent by television, Wonka is pointing to the screen when the camera is showing outside the screen, but a split second later, when the camera is showing inside the screen, both of Wonka's hands are leaning on his cane.

AidanN

Love and Cheese / Weighing Harold - S4-E7

Continuity mistake: Lila was pretty much entirely underwater in a "standing" position when Arnold rescued her, how come suddenly the water only reached her knees?

AidanN

Big Gino / Jamie O. In Love - S4-E2

Revealing mistake: In the cafe, after Charice speaks, when Gerald says "Aloha, Gladiators on Ice", there are three places where Gerald's mouth disappears.

AidanN

Dinner for Four / Phoebe Skips - S4-E5

Revealing mistake: When Helga and Phoebe leave the girls' bathroom together near the end, Helga pushes the door outward, but the hinges are on the inside, so it should only open inward.

AidanN

Weird Cousin / Baby Oskar - S4-E11

Factual error: Stephen Viksten is credited twice for voicing Oskar.

AidanN

Monkeyman! / Buses, Bikes and Subways - S5-E1

Trivia: The banana warehouse at the dock says "ROB RTSON" on top; Chris Robertson is one of the show's artists.

AidanN

It Girl / Deconstructing Arnold - S4-E9

Continuity mistake: When Eugene breaks into the area with the dogs, you see the pedals of his bike tossed into the air, but the pedals fell off on the other side of the street.

AidanN

Trivia: According to the Guinness Book of World Records, The Shining holds the record for the film with most retakes of a single scene (with spoken dialogue) at 127 takes. The participant in those retakes was Shelley Duvall.

AidanN

Sid's Revenge / Roller Coaster - S3-E8

Trivia: There are two versions of this episode. Originally, the closing credits appeared over the ending scene with Eugene going around and around in the roller coaster. When Nickelodeon switched to its "squeezed" credits format, a second version was created with the credits removed from that scene, and a new set of credits (over the "normal" credits background) added to the end. (This was later done with "Principal Simmons" as well.)

AidanN

Career Day / Hey Harold! - S3-E11

Continuity mistake: There are more than 16 slips in the hat, but only 16 students in class, and only 12 hands went in to pull out slips.

AidanN

The Aptitude Test / Oskar Gets a Job - S3-E9

Plot hole: Mr. Simmons asked that each student put their name on the test folders, but the folders already had names on them when he handed them out.

AidanN

The Aptitude Test / Oskar Gets a Job - S3-E9

Revealing mistake: The test paper Eugene put back in Harold's folder is blank.

AidanN

Crabby Author / Rich Kid - S3-E17

Trivia: The book publisher's name is "H. MacDonald"; Hugh MacDonald is a layout designer.

AidanN

The Aptitude Test / Oskar Gets a Job - S3-E9

Plot hole: When Eugene dropped the tests, just about all of them fell out of their folders, but apparently only Harold and Helga's were switched.

AidanN