Arnold uses a generic alarm clock, which in following episodes will be replaced by a custom, look-alike one.
A first look is given at the 4th grade classroom, including a prominent board that reads "IF I WERE PRESIDENT", with the students' ideas pinned all over it.
Ruth McDougal makes her first appearance in this episode.
Arnold's crush on Ruth is implied to have started before the series events.
Ruth, alongside two girls named Dodie and Jennifer, are considered as probable owners/authors of the pink book.
Dodie is the name of one of the main characters of As Told by Ginger, another Nicktoon, which would premiere its pilot two years later after this episode's original airing.
The official Hey Arnold! site listed this episode as The Little Pink Book Catastrophe!!
Continuity[]
This episode marks the first time Helga has broken into Arnold's house; it also marks the first time Helga had to go to extreme lengths to keep her secret affection for Arnold from being discovered.
This is also the first time Helga spends the night hidden inside the boarding house. She would do it again in Helga's Parrot (episode).
Helga becomes a leading villain for the first time.
Although Arnold is implied to keep Helga's book (minus the last page) it is never featured or mentioned again in the series.
