T.J. skips grades and enters high school at age 10.
In the opener, T.J. has trouble learning the ropes outside the classroom and pays the price for breaking ""The Code,"" which states you never rat on a friend. The friend in question is Mo, a star player on the school's basketball team. When T.J. tattles on Mo for smoking in the boys room, Mo is suspended from the team and misses an important game. Ostracized and unhappy, T.J. hatches a misguided plot to make amends by sabotaging the rival team's report cards.
Two twin sisters move to the school. Marcus gets a date with the pretty cheerleader, but unknowingly mistakes her for her smart twin later. As he realizes how much he likes them both, Marcus sets up a plan to date them both. The cheerleader will date Marcus, while the intelligent one will date ... Marquis.
When the keyboard player in Marcus' band breaks his finger, T.J sits in. Meanwhile, Yvette is mortified when her friend admits having a crush on her dad.
When Mo and T.J. are teamed up by their biology teacher to observe animal behavior, T.J. decides they'll watch his brother Marcus and sister Yvette.
T.J. earns a spot on the game show Knowledge College in the hope that his winnings will help defray household expenses, but the pressure may be too much.
Yvette is convinced T.J. is dying to go to the prom, despite his protestations, so Floyd gets him a date -- then Marcus gets him a date -- then Yvette gets him a date....
T.J. tries to run for student-council president, but decides Marcus would be a better choice -- and someone he could control behind the scenes.
T.J. learns a hard lesson about office politics while taking part in a work-study program that lands him in a lofty position at an electronic company. Floyd lays down the law when he feels that T.J. is spending too much time at work and not enough time with the family.
When the basketball coach quits his job in the middle of a game, the team must come up with another coach or forfeit - so T.J. is elected.
T.J. hooks up his dad with a date from a computer dating service, but is uncomfortable when their relationship heats up.
T.J.'s IQ takes a dive after he's accidentally hit on the head by a wood plank, allowing him to act more his age.
T.J. defends Mo when he's accused of setting a fire to the school's chemistry lab where his most hated teacher was working. Meanwhile, Marcus tries to embellish his non-speaking part in the school play.
T.J., Marcus and Mo decide to do a music video for their video-production class, with T.J. directing. Meanwhile, Yvette falls for a hunky swimmer who's a little shallow.
T.J.'s classroom behavior irritates a teacher who feels it's preventing the other students from learning. Meanwhile, Mo and Marcus try to meet girls in a female self-defense class.
To discourage a tireless suitor, Yvette agrees to T.J.'s plan and pretends to be Mo's girlfriend. Meanwhile, Floyd aims to teach Marcus a life lesson he won't soon forget.
T.J. ghostwrites love letters for Marcus to Nina, the new girl in their literature class - and winds up having to ghostwrite love letters for Nina to Marcus, and vice versa.
TJ's skill in chess gives him the chance to play against a computer, Socrates, that's supposed to be unbeatable in chess. Marcus plans to win big on money bets.
Floyd, T.J. and Marcus build Yvette her own private bathroom, but she is less than thrilled. Meanwhile, T.J. and Mo must work out a family budget for their Life Science class.
T.J. thinks his dad's business would benefit from a TV commercial, but when the station airs it at 3:00am, T.J. sneaks in and repositions it - during the Super Bowl.
T.J. decides he wants to be a reporter, but since answering to Yvette as the editor of the school paper is more than he can take, he starts his own rival publication.
T.J. falls for a girl at the arcade but falls short in the style department, so he tries a new look -- one his dad does not approve.
When the star player of the basketball team is in danger of flunking history and being off the team, it's up to T.J. to tutor him before the big game.
T.J. qualifies as an intern at the Primate Intelligence Research Project. Meanwhile, Marcus and Mo try to get rich selling "nutritional, energy supplement" candy bars.
Tales of Floyd's Uncle Mert, a 1960s activist, inspire T.J. to protest a change in the school's lunch policy.
T.J. buys bootleg computer games but soon runs into trouble with a sinister stranger. Meanwhile, Marcus and Mo buy a used car that doesn't run.
After attending a dance class with Yvette, T.J. decides his life's ambition is to become a tap dancer, but he finds out it's no cakewalk.
When Mo's parents leave for a second honeymoon, he stays with the Hendersons, but it drives a wedge between T.J. and Marcus. Meanwhile, Floyd objects to Yvette dating a college guy.
Floyd starts having doubts when T.J. bonds with a new astronomy teacher, making him question his importance in T.J.'s life. Meanwhile, Marcus and Mo find another student exploiting their personal style by photographing them for a fashion magazine against their wishes.
T.J. is thrilled when he talks Brandi into joining the basketball team - until she replaces him as starting point guard, and he's relegated to the bench.
New romances are on the horizon for both Marcus and Mo in this episode. Marcus finds himself interested in Stacey, the new drummer for their band, while Mo's intended girlfriend rubs the other musicians the wrong way. Marcus is the one to suffer heartbreak first, leaving T.J. to try to pull him out of the doldrums.
Yvette and Mo hatch a plan to eliminate the competition in a radio station Volkswagen Beetle giveaway to the person who can stay inside it the longest. While they're in the vehicle, Marcus tries to take advantage of having the house to himself, but T.J. foils him.
When Floyd has to go out of town on business, Marcus tries to step in as the man of the house. T.J. poses some unexpected problems when he decides to court popularity by throwing a party for his classmates.
Mo gets the shock of his life when his parents tell him he's adopted, so he immediately enlists T.J. in his search for his birth parents.
T.J. is accepted into Mensa, where Floyd meets an attractive divorcée, but T.J. can't stand her uppity son Blake and gets into a brawl. Meanwhile, Marcus and Mo become hairstylists.
TJ becomes the new assistant to Coach Gerber when the math teacher finally quits. Meanwhile Yvette meets a guy named Calvin who she finds attractive who turns out to be in middle school.
T.J. is forced to take wood shop and finds out it's not as easy as he thought. Meanwhile, sparks fly between Yvette and a photographer.
When Floyd tells the kids to get a job, Yvette heads for a clothing store at the mall, while T.J. and Marcus set up a ""Homework Hotline,"" but they all encounter problems they hadn't imagined.
T.J. lands a gig as a dancer in a music video by Destiny's Child and gets an offer to tour with them for a year, but his dad isn't so sure about the idea.
Marcus and his girlfriend Dana break up, prompting her to ask Mo to intervene. Meanwhile, T.J. faces gym class - and the locker room - for the first time.
Computer snooping helps Marcus woo T.J.'s study partner.
Yvette has a recurring dream in which she marries Mo. Meanwhile, Marcus dreams up a scheme to make money to buy a new sound system.
A dejected Yvette decides she needs breast augmentation after another actress is picked for a plum stage role. Meanwhile, T.J. is harassed by bullies who make fun of his ears.
To enlighten Mo about feminism, Yvettle buys him at a school slave auction. Meanwhile, T.J. helps Coach Gerber do his taxes.
When Marcus sees Mo's girlfriend with another guy, he can't decide how to tell Mo. Meanwhile, T.J. thinks he's on the bad side of the Secret Service after writing an angry letter to the White House.
Marcus scores a date with the girls' volleyball team champ, but plays second string socially. Meanwhile, T.J. tries to boost Mo's brainpower.
T.J. develops his first crush on a beautiful substitute teacher; Marcus is accidentally offered a university scholarship.
T.J.'s call to a political talk show prompts an invitation to appear as a guest -- and to replace one of the regular panelists permanently.
Angered over rising machine soda prices rise, T.J. markets his own cheaper soft drink with the help of Yvette, Marcus and Mo.
T.J. plans a prank for graduation, while Yvette decides to boycott her graduation.
Floyd refuses to believe T.J. drank beer at a party with his pals.
