Parent-teacher night leads Mr. Drummond to a romance with Arnold's teacher and poor Arnold to the jealousy of his classmates. Arnold tries every trick in the book to win back his classmates, including one which may have him expelled.

After Arnold fails to measure up to the demands of the basketball, baseball and volleyball teams, Drummond convinces the boy to try football on for size and then pays the coach a clandestine visit to ensure Arnold a place on the team.

Arnold's poor dental checkup and a visit by Drummond's health-conscious sister, Sophia, launches Drummond on a campaign to have ""junk"" food machines banned from Arnold's school, even though Arnold's drive for his class' presidency may depend on keeping the machines in place.

Arnold's tenth birthday party means a lot to him, but for some reason it means a whole lot more to the one person he's determined won't be invited -- a pesky young lady who always tries just too hard to be friends.

Dudley, fearing his foster father's lost job means he's headed back to the orphanage, cons Arnold into getting Drummond to consider adopting him into their family.

Arnold's big plans for his first real ""date"" are quickly deflated when parental-imposed restrictions threaten to ruin his encounter before it ever gets off the ground.

Arnold and his friend Dudley are scared to death by two teenage bullies who pose the intimidating demand ""your lunch money or your life.""

Arnold doesn't know when to leave well enough alone after Willis comes to his rescue, he gets himself involved in an ""undercover"" scheme to capture the ""punks"" at school who have been harassing him.

Arnold feels shortchanged, he's growing older but he's not getting any taller and he's convinced that's the reason why he doesn't have a girl friend.

Arnold is determined to defeat brother Willis at his own game and dethrone him as local video game champ, but in doing so Arnold's passion becomes a destructive ""addiction"" that could have serious consequences.

Arnold's on the outs with his best friend Dudley after he innocently offers to help his bashful buddy win the heart of a young lady -- who falls for Arnold instead.

Arnold and his buddies fabricate a ""little white lie"" in an attempt to get rid of an overly-conscientious substitute teacher, but their tell tale could result in more than just removing the teacher from the classroom -- it could destroy his entire career.

Arnold must face the bare facts -- his chances of winning a prestigious school election seem desperately slim, thanks to an ""overexposed"" candid campaign photo taken by sister Kimberly.

Unaware that he's being lured into the carefully crafted trap of a child molester, Arnold eagerly agrees to perform a simple task in return for an overly generous reward from a ""friendly"" neighborhood merchant.

Arnold and Dudley's ""friendship"" with a local merchant reaches a dangerous turning point when, unbeknownst to the boys, the man, who is actually a child molester, is about to make his move.

Arnold's good intentions backfire when his efforts to help his handicapped friend Kathy adjust to life in public school cost him the esteem of his classmates and the friendship of pals Dudley and Robbie.

To try to curb Arnold's run of bad luck, Drummond gives him a pet cricket, but the Japanese ""good luck charm"" brings nothing but sleepless nights and dreams of ""pesticide"" to the rest of the household.

Determined to prove he didn't fabricate a story about drug abuse in his grade school just to win a journalism contest, Arnold takes his article to the New York City newspaper sponsoring the competition, and when they run his story on the front page, Arnold receives some unexpected more support from First Lady Nancy Reagan.

Arnold's Romeo is steeped in more turmoil than Shakespeare ever intended when he's tricked by his ""best friends"" into playing opposite arch-nemisis Lisa's Juliet.

Arnold's ecstasy over meeting his hero Mr. T goes from elation to emulation when the young girl he's trying to impress snubs him in favor of his idol. Former bouncer and bodyguard Mr. T, who came to national prominence as Sylvester Stallone's opponent in ""Rocky III"" and was the star of the hit television series ""The A-Team,"" makes a special guest appearance as ""The A-Team's"" B.A.

Arnold's first day at junior high is emotionally devastating when he's shunned for not measuring up to the expectations that everyone had for Willis Jackson's brother, but Arnold devises a risky scheme that he feels certain will elevate his prestige.

Willis' seemingly harmless disregard for the truth turns dangerous when a self-serving lie about knowing CPR jeopardizes Arnold's life.

Arnold is disappointed to discover that his favorite teacher moonlights as a cocktail waitress, but he's stunned when he learns why she has to work the second job.

Arnold turns a pal into an opponent when he resigns as Dudley's campaign manager and declares his own candiacy for class president.

Arnold and Dudley succumb to peer pressure and ignore warnings against cigarette smoking, only to have the harsh realities brought to light by Dudley's father, a chronic smoker.

Hitchhiking leads to kidnapping for Arnold and Kimberly, but Arnold escapes and he is so disoriented he is unable to remember the location of the kidnapper's apartment so that the police can rescue Kimberly who's till being held captive.

Upset over Maggie breaking off their relationship, Drummond chases her to Hollywood to win back her heart, but while he woos Maggie, Arnold and Dudley sneak away from a studio tour to find the star of Knight Rider and wind up in a life threatening situation.

Arnold and Pearl fall into a depression when Maggie and Phillip return from their honeymoon with a temporary eviction notice for Pearl, and orders for Arnold to babysit for his ""tag-along"" little brother Sam instead of going to a party.

In a quest for religion started by Maggie and his father, Arnold thinks he has found it after attending an impressive bar mitzvah where his friend ""Becomes a man"" at age 13.

The money for the National Wheelchair Games that Arnold's class has raised and entrusted to him is missing--leaving Arnold embarrassed and his family ""in the dumps.""

When Arnold and Sam creep through the crevices of the neighborhood's haunted house they find the ghost boasts a bounty of surprises--the biggest being a love for people and contempt for war.

Arnold thinks the school science fair is the perfect opportunity to sabotage the project of his least favorite female classmate, but with a closer look he wonders if her aggravating behavior is really a cry for help.

Arnold risks expulsion from school when he leads a strike against some new rules he feels are ""unfair.""

When Arnold is appointed judge of the school court, he is suddenly faced with jeopardizing a longtime friendship or losing a date with the school heartthrob--everyone has their day in court.

In order to be elected the entertainment chairman for a school charity fundraiser, Arnold promises to get a celebrity but when it's time to deliver, he's forced to look to his nemesis Carmella for help, hoping she can save the day.

Arnold's attempt to stop a friend from drinking backfires as he's left standing in the boy's bathroom holding a bottle of booze when the teacher walks in.

Arnold is faced with a dilemma when his friends insist he take a cute cheerleader to the dance instead of the girl Arnold really likes who they consider an ""ugly duckling.""

Although Arnold boasts he held his own in a mugging, Drummond fears the incident goes deeper than Arnold will admit and becomes concerned when he finds Arnold has sought a dangerous method of protection.

Guarding the school bully's girlfriend, Ramona, seems like a simple task to Arnold, until his natural Jackson ""charm"" creates some problems, Ramona falls head over heels for him and Herman, the bully, wants to rearrange his face.

Kareem Abdul-Jabbar guest stars as a high school English teacher who gives Arnold a ""classic"" punishment for ""goofing off"" in class and the freshman quickly learns his lesson when his penace is teaching ""A Tale of Two Cities"" to his rowdy classmates.

A music instructor ""backs up"" Arnold after he claims to be an expert sax player in order to impress a girl.

Father and son are feuding over First Amendment rights when an outraged Arnold objects to a white supremacy organization speaking at his high school and a discerning Drummond can't support Arnold's fury on the basis of the American right to free speech.

Arnold's feature story about his high school football team threatens to turn into a controversial expose for the school newspaper when he witnesses team members buying steroids.