It's the first day back at school and there are some new additions to Mr. Moore's class.

Simone and Eric have eyes for others, but neither agrees with friends that honesty is the best policy.

Certain members of the class suspect Alex of stealing Darlene's antique ring.

Viki tells Charlie she's got a crush on him, but Alan gets the impression that he's the one she wants to squeeze.

Dennis becomes smitten with a quick-witted student who reprimands him for not cleaning his science-lab work area.

Arvid and Dennis meet Buzz Aldrin while at the Johnson Space Center presenting their experiment, which may be included in a shuttle mission.

Arvid decides to return to Houston, where Dennis once again steps into the spotlight that should be on Arvid.

T.J. and Alex look like a shoo-in to win the all-city dance contest, until Alex takes a fall--academically.

Charlie teaches the class about grief.

After hearing too many comments about his snoring, Arvid considers getting a complete nose job.

With just one history paper keeping her from joining the honors program, T.J. makes a pact with the Devil, who delivers the paper and more--until pay-back time.

The IHP students help the school's star athlete prepare for his college entrance exams.

T.J.'s first assignment as the newest member of IHP is ridiculed by Dennis.

Viki gets much-needed help on a home-ec project from Eric, who prefers to hide his talents for fashion design and construction.

Arvid goes a bit too far in trying to impress a film buff by guaranteeing he'll get a print of a rare 1950s Polish film.

A condescending Alan burns some bridges with his classmates after being recommended for early admission to Harvard by a recruiter.

The head of the English department takes some not-so-subtle action against Charlie's choice of "Hair" as the semester production.

The spirit of "Hair" leads the cast to go on with the show in defiance of Mrs. Hartman, who explains her objection to Charlie.

In a flashback to college-recruitment day, Arvid turns into jelly, Dennis turns into Alan and Simone turns on Eric when he hesitates to join her at Sarah Lawrence.

The IHP welcomes a brilliant new student--until he voices his opinion about the Academic Olympic team.

After his sea rescue of Simone, modesty becomes Dennis, until he tastes the attention of the press--and Simone, who will do "anything" to repay him.

After promising his vote to three women, Arvid thinks he's off the hook when the dance-queen contest is cancelled.

Infatuated with a model, Alan determines to meet her, but the result is not a model relationship.

The class sends Charlie's demo videotape to Woody Allen to get him an audition for a new film.

Aristotle's work videotaping a wedding garners him interest from an agent--of the FBI, who wants a copy.

Night-class students Charlie and Eric each think they are the apple of the teacher's eye when she joins them for after-class coffee.

Charlie doesn't return for the new school year and the Kids are wondering where's Charlie? Charlie found an acting gig and left and now the students have a new teacher, Billy MacGregor.

When Alan is caught cheating, Billy has the class act as a jury to decide his punishment.

Arvid goes out with gorgeous Viki.

Arvid's infectious flu may keep the class from performing in a Shakespeare competition.

Billy tries the personals ads.

Inspired by his French class, Eric goes to ""find himself"" in Paris.

Billy fakes a heart attack to circumvent a health-insurance bureaucrasy; the IHP girls try writing a romance novel.

After Billy is robbe, he has the class write papers on gun control, leading Arvid to a harrowing experience when he buys a gun for the assignment. (Part 1 of 2)

Bully Zach may have Arvid's missing gun. (Part 2 of 2)

The IHP class behaves obnoxiously when their bus breaks down at a rural truck stop.

Jasper's overprotective parents hire a babysitter for him -- and to his mortification, it turns out to be Sarah.

Billy and Bernadette take dance lessons at the studio where Alex teaches, and where he's pursued by a woman.

Arvid trains a chimp at his part-time pet store job and, rather than let it be sold, hides it in the classroom.

Simone's reputation suffers when Alex lies to his friends about a romance with her.

At Christmas, Billy helps Viki find her birth mother, but the woman doesn't want to see her.

T.J. turns down Aristotle's invitation to the senior prom.

The kids work on their yearbook, with Eric beginning to regret not having participated more extracurricularly.

To save Dennis after a prank, Billy creates a fictional student -- who apparently gets the MIT scholarship Dennis wanted.

Darlene promises to treat the class to an elaborate farewell dinner, but then finds her credit card revoked.

The class learns T.J. is more than just a contemporary-style musician when Billy discovers her operatic talent.

With a wrecking ball ready to demolish the school, the IHP class waits to fund out who's to be valedictorian. (Part 1 of 2)

The IHP class graduates, with T.J. as valedictorian. (Part 2 of 2, and series finale)