While Helga tries to find the perfect gift for Arnold, Arnold tries to find Mr Hyunh's long-lost daughter.

Helga decides to give her talented sister Olga a taste of reality by changing her grade in her report card.

Arnold has a magic show and he makes a disappearing act and uses Helga as the person disappearing. Helga decides to play a trick and literally disappears. She bumps into a pole and has a dream on how the world would have been if she's gone.

Helga drinks a potion to lose all feelings for Arnold.

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

Patty challenges Helga to a fight after Helga gets on her last nerves by picking on her once too many.

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.

When Bob has to go to a business meeting, Miriam and Helga are forced to go on the family road trip by themselves.

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.

Arnold and Helga both think they are having the worst Thanksgivings ever. Arnold's Family are celebrating President's Day, and Olga is at the Pataki house. When Arnold and Helga go to Mr. Simmons' house, they discover he has a obnoxious family, so they think their families aren't so bad after all.

The school is doing the play "Romeo and Juliet". Arnold lands the role as Romeo so Helga will do anything to beat out other girls to get the part of Juliet, so that she can kiss Arnold in the final scene.

Helga's sister Olga comes home for spring break and becomes a classroom aid in Helga's class, much to Helga's chagrin.

After Bob pops his spine, Miriam runs Big Bob's Beepers. She gets in over her head and forgets about her family.

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.