Welcome Back, Kotter - Season 4

Kotter becomes the new vice principal and the Sweathogs think they can get away with anything they want. When they tie up Carvelli and Murray, Kotter gives them detention and they decide to quit school and get jobs.

Horshack, Epstein, and Washington, now dropped out of school, decide to look for jobs. Kotter then asks Barbarino, now working as an orderly, to convince them to go back to school.

Buchanan High gets a new student, Beau DeLabarre from New Orleans, who uses his southern charm to hit on several girls including Juan's girlfriend. Juan strikes back, then Beau sets him up with a girl who has a jealous husband.

Barbarino gets his own apartment and the Sweathogs think they have a new hangout. Barbarino tells them they are only welcome at his apartment when he invites them over. Offended by this, the Sweathogs storm out of his apartment.

A new girl at Buchanan High contemplates suicide after having a hard time making friends.

Carvelli offers to sell the Sweathogs his car so they tell him about the time they bought a car from Barbarino's uncle. While waiting at the hospital for the car, the Sweathogs see Uncle Louie wheeled in on a gurney after a car accident.

Woodman goes to the hospital to have a bunion removed. After the surgery, Barbarino takes him back to his room but loses him on the way. Now the Sweathogs scour the hospital looking for Woodman.

Carvelli brings in an X-rated film and asks Epstein to show it for the guys. Meanwhile, Julie prepares to show a sex education film to protesting parents. The two films get mixed up and the parents see the X-rated film.

When Vinnie gets dumped by a girl in front of the Sweathogs, he gets depressed and is too ashamed to leave his apartment.

A nerdy student tries to win the approval of the gang by emulating Washington.

The students are told as part of their biology requirement they're going to have to dissect a frog. And Arnold refuses to do it. He even protests by trying to take the frogs. He is told if he doesn't do it, he will get a failing grade and he's asking the other Sweathogs for support.

Freddie rewrites Woodman's version of the school anthem. A big time recording artist hears him singing it and decides he wants to use it on his next album. But Woodman opposes the idea of the school song going commercial.

Vinnie selfishly buys himself a new camel hair coat for Christmas. He feels it makes him stylish. So to him it's a tragedy when a couple of hoods steal it from him. Will the coat crooks be caught or a Christmas lesson taught?

The word is out that Barbarino is getting married. But he isn't marrying his girlfriend and the secret marriage has something to do with Epstein.

Barbarino is frustrated because he doesn't get a good job at the hospital. So he is excited when he has to take a pregnant woman to her room. But the elevator breaks with them in it and she goes into labor. Now he has to deliver the baby.

Mr. Woodman's niece, Kelly, babysits for the Kotters one night when Epstein comes by looking for Mr. Kotter. He finds Kelly instead, they become acquainted, and they eventually move in together, to Mr. Woodman's horror.

Terrified of going out with pretty Mary Johnson, Horshack believes he can find courage in a bottle.

Epstein is assigned to the school paper and changes it from a dull, lifeless weekly to a gossipy, sensationalist money maker -- almost losing his friends in the process.

Freddie and Juan compete in the school talent show, but Carvelli woos the judges so he can win the competition. So Horshack and Beau become alternate judges and fill in when the other judges are unable to fulfill their duties.

Arnold and Mary express their love for each other, then Arnold learns his mother married a blackjack dealer in Atlantic City, and now he has to leave school and the woman he loves. So Instead of leaving, Arnold asks Mary to marry him.

Arnold gets upset when the other Sweathogs tease him about not being able to provide for Mary, and he vanishes. Mary finds him and convinces him not to worry, and the two get married.

Beau plays pranks on Mr. Woodman in order to redeem himself to the Sweathogs.

While Horshack adjusts to married life, Epstein sets up an interview for a job. Washington gets the job before Epstein, unaware that it's the same job. The two get into a fight and end up in a gym ready to box.