01. Where's Charlie?
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.
02. Twelve Angry Nerds
When Alan is caught cheating, Billy has the class act as a jury to decide his punishment.
03. The Heartbreak Nerd
Arvid goes out with gorgeous Viki.
04. And Then There Were None
Arvid's infectious flu may keep the class from performing in a Shakespeare competition.
05. Getting Personal
Billy tries the personals ads.
06. Napoleon Blown Apart
Inspired by his French class, Eric goes to ""find himself"" in Paris.
07. Billy's Big One
Billy fakes a heart attack to circumvent a health-insurance bureaucrasy; the IHP girls try writing a romance novel.
08. Dead Men Don't Wear Pocket Protectors (1)
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)
09. Dead Men Don't Wear Pocket Protectors (2)
Bully Zach may have Arvid's missing gun. (Part 2 of 2)
10. Fillmore vs. Billy Jean's
The IHP class behaves obnoxiously when their bus breaks down at a rural truck stop.
11. Be My Baby . . . Sitter
Jasper's overprotective parents hire a babysitter for him -- and to his mortification, it turns out to be Sarah.
12. Dancing Fools
Billy and Bernadette take dance lessons at the studio where Alex teaches, and where he's pursued by a woman.
13. My Son the Primate
Arvid trains a chimp at his part-time pet store job and, rather than let it be sold, hides it in the classroom.
14. The Importance of Being Alex
Simone's reputation suffers when Alex lies to his friends about a romance with her.
15. Viki's Torn Genes
At Christmas, Billy helps Viki find her birth mother, but the woman doesn't want to see her.
16. The Last Waltz
T.J. turns down Aristotle's invitation to the senior prom.
17. Most Likely to Be Forgotten
The kids work on their yearbook, with Eric beginning to regret not having participated more extracurricularly.
18. The Strange Case of Randy McNally
To save Dennis after a prank, Billy creates a fictional student -- who apparently gets the MIT scholarship Dennis wanted.
19. My Dinner With Darlene
Darlene promises to treat the class to an elaborate farewell dinner, but then finds her credit card revoked.
20. The Phantom of the Glee Club
The class learns T.J. is more than just a contemporary-style musician when Billy discovers her operatic talent.
21. It Couldn't Last Forever (1)
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)
22. It Couldn't Last Forever (2)
The IHP class graduates, with T.J. as valedictorian. (Part 2 of 2, and series finale)