Hey Arnold!

At a sleepover, Arnold and the boys sit around and tell scary stories. All of the stories are pretty lame until Arnold tells the story of the "Headless Driver, the Laughing Lady and Her Little Dog."/Wolfgang dares Arnold and the gang to break superstitions, which causes a spate of bad luck to erupt.

Big Bob gets a parrot which eventually gets on his nerves. He passes the bird on to Helga, who inadvertently spills her emotions about Arnold to the bird./Arnold and Gerald decide to sell chocolate turtles to raise money for the club's ongoing go-cart project.

Arnold goes all out to win Lila's affection by taking her to the Annual Cheese Festival. Helga attempts to foil Arnold's plans, but every scheme she hatches backfires and pushes Arnold and Lila closer together./Harold feels that he has gotten too fat, so he gets his parents to send him on a weight-off cruise.

Helga becomes the latest child fashion star and everyone loves her for her scowl and bad attitude. First she thinks it's great, then when she feels that she has lost her individuality, she wants to quit./The gang finally gets sick of Arnold's never-ending good advice, so they all decide to stop listening to him all together.

When Arnold and Grandpa get into a fender bender with Helga and Big Bob, the typical argument of who's at fault ensues./After a confrontation at PS 118 between Rhonda and Patty, they both end up at the same finishing school, where Rhonda feels that she has the edge over the bigger, less dainty Patty.

Arnold and Gerald, and Grandpa and Gerald's Dad visit a Veteran's memorial. Both older men tell "tall" tales about their military exploits, which the boys find hard to believe. But the boys learn that the men have done something meaningful when they arrive at a memorial and see that they were telling the truth.

Grandpa returns back to grade school so he can finally fulfill his dream of graduating. Things go great and Grandpa is skipped all the way up to the 6th grade. /Mr. Simmons gives the class an assignment to couple up and take care of an egg over the weekend to learn teamwork and responsibility.

Arnold's weird cousin, Arnie, arrives for a visit and appears to be the biggest loser to everyone except Lila, the love of Arnold's life./Oskar's wife Susie agrees to watch her cousin's baby, also named Oskar. When Susie gives more attention to the baby than her husband, Oskar gets jealous and becomes even more demanding than usual and wants nothing to do with the trike.

After eating pork rinds, Helga begins to sleepwalk and ends up walking to Arnold's house. Not knowing the cause, she tries various methods to keep herself from leaving the house, but they all fail./The Fighting Families Contest has come to town and have selected two families: one from PS 118 and PS 119.

After being saved from thugs by a mysterious, caped character named Monkeyman, Arnold tells the gang about it and then Gerald unfolds the legend of the dangerous and dark costumed character who runs through the streets yelling "Monkeyman."/Out on a field trip, Harold and Helga miss the bus and get separated from the rest of the class.

Grandpa's sister, Mitzi, shows up out of the blue to grace the boarding house with her presence. Everyone loves her except Grandpa, who has a long-standing feud with her since childhood./When Coach Wittenberg needs to form a synchronized swim team to save his job, he recruits Arnold, Gerald and the rest of the gang to compete.

When Helga realizes that Arnold is so taken by Lila because of her wit and charm, she decides that the only way to get Arnold to notice her is to be like Lila./When the potholed streets in front of Mr. Green's butcher shop begin to hurt his business, Arnold helps Mr. Green run for the City Council.

Helga is recommended for counseling after Mr. Simmons observes her berating Arnold, arguing with her parents, etc. She learns that unrequited love is very normal and that she's actually okay.