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.

Drummond, Willis and Arnold bravely subdue a burglar who had been holding the family at gunpoint, but the arresting officer is befuddled when the three ""crime fighters"" relate differing versions of the apprehension.

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

When 13-year-old Arnold is notified to register for the draft, Drummond's over reaction to the obvious error turns Arnold's dreams into nightmares.

A short visit to the United States by Phillip Drummond's Dutch cousin Anna and her son Hans becomes an eternity for Arnold and Willis, who are made scapegoats for cousin Hans' mischief.

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.

Kimberly's 18th birthday present from daddy -- a trust fund -- will make her a wealthy woman, but her free-spirited dreams of independence could be cut short when Drummond discovers just how she intends to spend her ""fortune.""

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

Drummond's provided with police protection of a most unusual kind after his charitable philanthrophy leads to a $1,000,000 extortion threat against him.

When Kimberly starts a campaign to open the school's Lettermen's Club to female membership, an embarrassed Willis retaliates with chauvinistic aplomb by becoming the first male contestant in the Senior Class Beauty Pageant.

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.

Arnold unwittingly solves his father's dilemma -- trying to make romance and finance go hand-in-hand -- when Drummond finds himself falling for an attractive local television aerobics instructor that his company is attempting to turn into an international success. Veteran Broadway and television actress Dixie Carter is introduced in the role of fitness instructor Maggie McKinney.

Kimberly and Arnold break a long-standing family rule and face death when, on their return from a shopping trip, they find themselves short of cash and decide to hitch a ride home rather than call home for assistance.

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's joy over being saved from an explosion by ""Knight Rider's"" David Hasselhoff quickly turns to dismay when he learns his father is getting married and a little brother comes along with the package.

Maggie's reaction to a proposed pre-nuptial agreement threatens to hamper Phillip's happiness -- but could eliminate Arnold's fear about ""inheriting"" a strict new mother and a pesky little brother.

Their family and friends assembled, Phillip and Maggie meet at the altar, only to realize each has made a major mistake, in the concluding part of a special two-part story. Charlotte Rae, Dody Goodman, Janet Jackson and Nedra Volz, each of who had appeared in recurring roles on ""Diff'rent Strokes,"" return as their original characters for the Drummond nuptials.

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.""

Willis and Charlene's budding young love begins to wilt when she moves in as a temporary houseguest at the Drummond's. Janet Jackson, Michael Jackson's younger sister, returns in her role as Willis' girl friend Charlene.

Blinded by love, Kimberly takes an enormous and deceptive risk when she talks her father into allowing her to move into an apartment, allegedly with her girl friend.

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.

The Drummond household is faced with Sam's bed-wetting problem trying everything from scolding to fawning, only to have Sam become more frustrated and hurt.

Willis becomes the middleman in a police effort to halt use and trafficking of drugs at his high school.

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

Sam must choose between a penthouse apartment and a honky-tonk club when his real father comes knocking on the Drummond's door, wanting to take Sam with him.

""The Gooch"" returns to taunt Arnold and take on a new target--Sam, only to face his first challenge in the Drummond's new neighbor, an Italian foreign exchange student.

Entrepreneur Arnold reluctantly allows Sam to be a part of his new scheme, when Sam realizes only Arnold will reap the profits, he breaks up the partnership and becomes the competition.

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.

Drummond's surprise meant to encourage an Olympic hopeful felled by a tragic accident backfires when the young man instead becomes embittered at meeting the 1984 Men's Olympic Gold Medal-winning Gymnastics Team until Willis and Sam take on the challenge of setting things right.

Drummond is a tower of strength for Sam as he prepares to have his tonsils removed, but what will happen when Drummond finds out he is to be Sam's roommate while having some ""minor"" knee surgery.

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.

Sam persuades a reluctant Mr. Drummond to become the coach of his bad news baseball team and then regrets it after he winds up on the bench.

When Sam visits a taping of ""The Sandy Squirrel Show"" he is overcome by the news his favorite television idol is about to be cancelled, but it's big brother Arnold to the rescue as he rallies the Boy Scouts of Manhattan to demand the Squirrel be given a reprieve.

The Drummonds are concerned when the normally lovable Sam battles with a cynical senior who rejects the Cub Scout's ""Adopt A Grandparent"" program, leaving Sam with a tainted view of older people.

Kimberly returns home from school in Paris to surprise Drummond on his birthday prompting Arnold and Willis to try and match her special gift, they decide to change their name to Drummond, until Willis suddenly has second thoughts.

Sam is taken aback when he realizes his new ""buddy"" is a girl, but Mr. Drummond is even more dumbfounded when the kids want to have a sleepover.

When Arnold's rocket for his school project is accidentally set off and lands atop the Russian Embassy, the state department is led to suspect the Drummond's participation is foul play.

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.

A camping trip with Arnold and Sam intended to strengthen Drummond's relationship with Sam goes awry when Sam's real father shows up and invites himself along.

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.""

When Drummond is accused of being out of touch with his employee, he secretly takes a job in one of his own factories working on an assembly line. Much to his surprise, his job is threatened when he makes suggestions to boost morale and improve production.

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.

Arnold and Sam's new friendship with a street performer gets mired in fear and confusion when they discover she has epilepsy.