After Arnold accidentally kills Eugene's fish with a yo-yo, he must do something to make up for it.

In this variation of "The Tell-Tale Heart", Phoebe plagiarizes from a poetry book and uses one of the poems as her entry in a poetry contest. She wins, with her prize being a trophy resembling poet Emily Dickinson. Then, the trophy haunts Phoebe into confessing.

Arnold and Gerald send the neighborhood alien crazy as they broadcast a mock Halloween radio show.

Rhonda gets glasses and finds out what it is like to be a "Geek".

Olga gets engaged to a con man who does not exactly woo Helga as he did the rest of her family, but she decides to let the marriage happen so Olga can be miserable. But she is given a change of heart from Arnold, and attempts to stop it.

After the results of an aptitude test are announced, Harold gains self-confidence and Helga feels dumber.

Bob hires a nanny to help Miriam around the house, much to Helga's dismay. From this moment on, Helga attempts to scare the nanny away.

The town is flooded and Arnold's class is trapped in the school.

A sleep-talking Helga confides into Bob's parrot about her love for Arnold. The next day, the parrot flies into Arnold's window, and it is up to Helga to get it.