After Rhonda and Patty get in a fight, both of their parents send them to polishing school, but it appears that Patty will graduate before Rhonda.
Watch Now:AmazonCurly gets Rhonda to act like his girlfriend after something happens to Rhonda's Mothers' fur coat.
Watch Now:AmazonWhile Grandpa, Arnold, Mr. Johanssen, and Gerald go on a trip, Grandpa tells Arnold that he single-handedly won World War 1, and Gerald doesn't understand why his Father was only a paper-pusher in Vietnam.
Watch Now:AmazonErnie starts dating a tall model, but she doesn't want to continue dating him because of his height.
Watch Now:AmazonWhen a psychologist comes to PS 118, she notices Helga's behavior, so she calls Helga for a session. Reluctantly, she goes, and tells this psychologist about her life and how she behaved this way... Eventually, Helga ends up telling the psychologist her feelings about Arnold and gains a trust with Dr. Bliss.
Watch Now:AmazonOlga gets into a 'Big Sis' program, but her 'Lil' Sis' is Lila.
Watch Now:AmazonWhen Principal Wartz quits as Principal, Mr. Simmons takes his place.
Watch Now:AmazonArnold has to hang around with his boring and odd cousin, Arnie, but Arnold starts to get angry when Lila and Arnie fall in love with each other.
Watch Now:AmazonEugene gets the lead role in the school musical 'Eugene, Eugene'. But the play director cuts the parts that Eugene is a hero, and makes the parts look like he is a loser.
Watch Now:AmazonThere is a new kid at P.S. 118, but he isn't the playful type, and he doesn't know the definition of fun, so Arnold and the gang try to teach him to have fun and take a break off his busy schedual.
Watch Now:AmazonSid thinks Stinky is a vampire.
Watch Now:AmazonStinky, Harold, and Sid are on the run after they think they blew up a police station.
Watch Now:AmazonHelga sleepwalks after eating pork rinds, making her confess her love to Arnold in her sleep.
Watch Now:AmazonArnold and Gerald really believe that they are cursed after doing a bunch of Friday The 13th legends, but it is really Wolfgang and Edmund following them and making them think that they are.
When Arnold, the boarders and the Patakis go to the beach, a girl uses Arnold to win a sandcastle competition. Ernie gets buried in the sand. Miriam and Suzie start taking dancing lessons. Grandpa thinks he's stuck on an island. Oscar starts using a metal detector to find ""treasure."" Big Bob gets a bad sunburn. Helga tries to warn Arnold that he's just being used.
Watch Now:AmazonWhen Harold overhears Stinky and Sid saying he's fat, he go's on a cruise to lose weight, but when he comes back he is very obese.
Watch Now:AmazonArnold visits his cousin Arnie, whose friends look remarkably familiar to Anrold's
Watch Now:AmazonArnold gets stuck in a tree with Harold and Eugene.
Watch Now:AmazonEverybody starts admiring Helga's way of being angry all the time, and she and her style become the lastest fashion, but she gets annoyed and tries ways to get the spotlight off of her.
Watch Now:AmazonArnold tells an urban legend about a Headless Cabbie, but when Arnold and they gang go through the park (for ice cream)where the legend supposedly happened, they have weird occurrences involving the legend their travels.
Watch Now:AmazonMr. Hyunh, Oskar, and Ernie purchase a race horse, or so they think.
Watch Now:AmazonAfter Arnold saves the life of a rich man, the man invites Arnold and Grandpa to his house. He tells Arnold that he wishes Arnold was the son he never had, but he really does have a son, but they share nothing in common.
Watch Now:AmazonPhoebe gets embarrassed after she 'passes gas' in front of a microphone.
When Arnold feels guilty about accidentally not sending out invitations to Eugene's Birthday party (because he and Harvey missplaced mail with each other), he tries to Eugene another surprise party.
Gerald's brother Jamie O starts dating, and suddenly starts acting nice with Arnold and Gerald. But when Gerald finds out that the girl Jamie O is dating is just using him, he must decide to go back to a life of torment or see his brother suffering for the rest of his life.
After paying his debt with Big Gino, Sid and him become friends, but Arnold believes that that friendship isn't good for Sid.
Eugene wants to ride with the gang, but they all think he's a jinx and won't go with him. Arnold decides to break the cycle of pain and rides with Eugene, but they get stuck.
Helga and Harold must return to town on their own after the bus leaves them behind after a school trip to a chocolate factory, and Helga has tickets for a wrestling match and she cant be late.
P.S. 118 is having an Arm Wrestling contest, but Harold get humiliated when he loses to Patty before the contest, so he asks Patty for some pointers on winning.
In his urban legend, he tells the story of the ghost bride, and how she murdered her husband after he left her for her sister. Turns out she's buried in the cemetery near the gang's neighborhood. She comes back from the dead every anniversary of the murders. Arnold, Gerald, Eugene, Harold, and Stinky are scared twice by Helga and Curly, by them pretending to be the ghost of Cynthia Snell, the Ghost Bride.
Gerald gets jealous because he thinks Jamie O. is trying to steal the girl he likes, when, actually, the girl likes Jamie O.
Coach Wittenberg talks Arnold, Eugene, Harold, and others to join a Synchronized Swimming team, and swim to the classic movie, 'Come Back Wayne'.
Arnold finds a journal describing the adventures of his parents in the Jungle. Also, it contains a map telling where they had to go after they left him.
Phoebe gets a chance to skip to the sixth grade after not being challenged enough with the fourth grade, but she is taking orders from her new sixth grade 'friends'.
Grandpa's sister unexpectedly shows up at the Boarding House, but Arnold doesn't know why she and Grandpa are always fighting with each other.
When school is out, Mr. Simmons' class gets stuck in the school because of an upcoming flood. When the class starts getting out of control, Arnold has to think quick.
Arnold, Sid and Gerald find a bag filled with money, but when Arnold loses it, everyone thinks he stole it.
The Coach wants to remarry Tish and asks Arnold to be his best man. Along the way, Arnold teaches the coach a thing or two about love and sacrifice.
Arnold and Gerald try selling chocolate turtles for a profit, but Timberly eats all fouth boxes of them, and they have to get money so they don't get in trouble with the Camp Fire Lass.