Welcome Back, Kotter

During the schools career day, Mr. Kotter and the Sweathogs meet a Mr. Takahashi, who offers Gabe a job with his company at three times his teacher's salary.

When the Sweathogs' treasury money is stolen, all fingers point to Washington who has just purchased a new bike.

The Sweathogs try to form their own gang in response to a scare from another gang. Gabe, Arnold, and Mr. Woodman act tough enough to scare both gangs out of any violent activity. 

Sparked by the fact that Vinnie neglected to do Freddie's homework, the Sweathogs spend the better part of class fighting with one another.

The Sweathogs go on a field trip to a museum and meet its mysterious, superstitious curator. In the process, they all get locked in a tomb of a mummy which supposedly holds a curse.

When the school arranges free medical checkups Gabe must confront his discomfort of going to the doctor.

Julie's sister from Nebraska visits and enrolls at Buchanan. She wants to be in Gabe's class and develops a fondness for Epstein...much to Julie's dismay.

With the approach of Sadie Hawkins Day, where the girls ask the guys to the school dance, everybody, including Horshack, has a date - everyone but Barbarino.

A student teacher joins Kotter's class only to find that normal teaching methods don't work with the Sweathogs. Then she adopts Kotter's style only to find out that it doesn't work for her.

When the opportunity to fight Carvelli in a boxing match arises, Arnold wants to be the one to do it; and when the other Sweathogs put down his manhood, he is even more determined to prove himself by getting in the ring.

The Sweathogs try to convince Epstein to give up his smoking habit.

To get into the Christmas spirit, the Sweathogs give a homeless man a shave and a new suit. But after he shows up at the Kotter's Christmas party wearing his old clothes, he tells them he's a bum, but he's a happy bum.

Epstein's younger sister is enrolled in Kotter's class and Arnold is immediately attracted to her, but so is Vinnie, and this drives Juan crazy. Freddie is also in a romantic mood and Kotter sees it as an opportunity to teach the Sweathogs about love.

Barbarino wants revenge after a gym teacher slaps him in the face.

The Sweathogs join the school newspaper and investigate the break-in at the principal's office. During their investigation, they discover some shady happenings at Buchanan High School.

Kotter's father travels 1,400 miles to see him and to see what he does at school. While the senior Kotter observes his son teaching about the Great Depression, he tries to take over the class and tell stories of living through that time.

Kotter needs $1,400 to fix his teeth. He becomes so desperate he starts moonlighting at a second job only to be discovered by the Sweathogs.

Horshack takes on the role of Cyrano de Bergerac for the school play. But when the other Sweathogs rank on him, he gets upset and runs away. Now, since nobody can find Horshack, Barbarino has to go on stage in his place as Cyrano.

After his fifth stepfather dies, Horshack decides it's time for him to grow up and become the head of the house.

When Gabe learns that Julie is pregnant, he cannot understand why she is less than thrilled to be having a baby.

The Sweathogs visit a radio station and get introduced on the air. When Freddie gets his turn to talk, he proves to be a big hit and develops a large fan following, but the other Sweathogs become jealous of his success.

With Kotter away on a teacher's conference, the Sweathogs decide to spend quality time with a pregnant Julie. However, Julie is not so thrilled with all the attention from the Sweathogs.

Epstein spies a sexy art teacher kiss Kotter and assumes that Kotter is cheating on Julie.