Freddie becomes addicted to drugs after taking prescribed pain killers. Despite the other Sweathogs' best efforts, the only thing that can bring Freddie around is Arnold's faith in him...and in his ""vitamin pills.""

Julie gives birth to twin girls.

Julie's parents come to see the babies.

Juan buys four term papers - one for each Sweathog - from Carvelli, only to end up with an essay that Gabe had turned in eleven years earlier.

Juan paints a great masterpiece on the walls of the school.

Mr. Kripps, the shop teacher, has a heart attack and dies while yelling at Vinnie, who blames himself for the man's death.

The Sweathogs and administrators at James Buchanan High reminisce about Gabe's past two years at the school. Past episodes are recalled through flashbacks.

Julie goes into labor.

At Christmas time, the gang reminisces over past episodes.

The Sweathogs' new tutor is a computer. Despite initial raises in grades, Gabe becomes displeased with the machine, as it is turning him obsolete to the class.

Gabe finds success as a stand-up comic, using material regarding the Sweathogs. But when the oppportunity for a full-time comedy gig arises, it could mean the end of his teaching career.

Emotions mix when it seems that the Sweathogs may win the lottery.

Arnold is accepted into a religious cult. Mr. Kotter and the three other sweathogs try to get Arnold to snap out of it. Eventually, he does and goes back to his former self, complete with his trademark laugh.

Juan, with the help of his uncle, hooks the Kotters up with a new apartment.

During a talent competition, Vinnie falls for a girl who the Sweathogs are competing against, and starts spending more time with her then rehearsing with the Sweathogs.

Vinnie is torn between trying to win the talent competition, or letting his new girlfriend beat him.

Kotter has a dream about life when the Sweathogs are old.

Freddie cheats on an English test.

Arnold voices angst and pioneers for change on the school radio station, gathering fans in the process.

Gabe must choose between the comedy life, or his life at Buchanan.

Rosalie ""Hotsy"" Totsy has grown up ... a little too fast. The Sweathogs go to a local strip club on a dare, and learn that Hotsy has gotten a job performing there (yup, she bares all, unknowingly in front of her former classmates). Vinnie, Freddie and Epstein all ride Hotsy's case, but Arnold is sensitive to her plight. Seems that, during a coversation with her former teacher Gabe, Rosalie really lived up to her nickname one night and got pregnant. And getting a job at a strip joint is the only way for this single mother (the baby's father had left Hotsy) to support her child. Gabe and Arnold convince the others to give Hotsy Totsy moral support, and they also refer her to a social agency which can help her finish school and find a more meaningful job.

Everybody helps Vinnie cram for a make-up test.

A new girl joins the Sweathogs.

Arnold, saddened by the rejection he keeps recieving from the opposite sex, gets advice and comfort from Julie before quickly falling in love with her.

After performing mouth-to-mouth resuscitation on a female student who has passed out in the classroom, Gabe is accused of molestation, and is in danger of losing his job.