Seasons & episodes

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.""

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

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.

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.

When Carvelli and Murray come on as exchange students, Carvelli seemingly goes crazy with stories of aliens.

Gabe announces that he is now the vice-principal and Mr. Woodman is the principal. The Sweathogs are pleased, until Gabe gets strict. After Vinnie visits the school to tell the gang he's dropped out, the other Sweathogs decide to follow in his footsteps.

With Barbarino now an ordlery at a hospital, the Sweathogs try to get jobs there, too. Meanwhile, Kotter tries to get the gang to return to school.

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Vinnie throws the Sweathogs out of his new apartment.

Horshack saves a lonely, overlooked girl named Mary Johnson from commiting suicide by jumping off the ledge of the school.

The Sweathogs remember how they tried to buy a used car from Vinnie's uncle.

When Mr. Woodman comes to Vinnie's hospital for an operation, Vinnie loses him and he and the other Sweathogs try to find him.

The gang is liable to get in trouble when the x-rated film Carvelli brought into school is accidentally mixed up with a film on sexual education.

Vinnie becomes depressed when it seems that he has lost his way with women.

A younger student begins to imitate Freddie, not much to Freddie's liking.

After Horshack refuses to disect a frog in class, his grade is in jeopardy.

The Sweathogs opt to change Mr. Woodman's tired old school song.

Vinnie is saddened when his new coat is stolen.

Juan asks Vinnie to marry his immigrant cousin.

Vinnie is forced to deliver a baby in an elevator.

Mr. Woodman's niece Kelly is babysitting for the Kotters when Juan drops by the apartment. The two abruptly fall in love and decide to move in together, but the romance begins to crumble when it seems that they can't respect one another's interests.

To get up his nerve with Mary, Carvelli offers Arnold liquor. He doesn't like the idea at first, but as time goes on, he becomes addicted to drinking; developing a scary and unlikable new personality that only turns Mary away.

Convinced that the school newspaper is too dull, Juan sets out to turn it into a tabloid, bringing down his friends' names in the process.