Welcome Back Kotter

Kotter begins to behave erratically when he learns that Julie will be going on a weekend ski trip, marking the first time that they've been separated since their marriage.

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.

Horshack is out to prove his manhood by fighting Carvelli in the boxing ring.

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.

Instead of the planned food fight, Kotter convinces the Sweathogs to stage an all-night classroom sit-in to protest the school's serving of liver for lunch.

Epstein goes to the guidance counselor to talk about being a veterinarian. She says he is not smart enough and he should look for a career in manual labor. So he gives his animals Kotter because he thinks he can't take care of them anymore.

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.

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

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

The Welcome Back, Kotter flashback episode. The Sweathogs throw Kotter a surprise party before the start of the new semester. During the party, Kotter and the Sweathogs reflect back on all the good times they had over the first two seasons.

As the Kotters prepare for the birth of their baby, the Sweathogs discover that Barbarino got left back in the 10th grade.

Julie goes into labor and Gabe waits to hear what she has. After waiting impatiently, Gabe is surprised to learn he's the father of not one, but two baby girls.

Woodman subs for Kotter while he and Julie bring the babies home from the hospital. Then Julie's parents drop in from Nebraska for a visit, and Gabe has to sleep on the fire escape.

Kotter buys Barbarino's share of the Sweathogs' lottery ticket, but Barbarino says he wants no part of it because they never win. When they do win the $1,000 semifinal prize, Barbarino and Kotter disagree on who should get the money.

Kotter refuses to help Barbarino study for his test that would promote him to the eleventh grade. So the Sweathogs make a deal with Kotter. If he helps Barbarino study, they will help Julie and the babies.

Horshack joins a religious cult and decides to drop out of school to go live with with the cult members. But before he leaves, the Sweathogs pull him into the school bathroom and try to deprogram him.

The Sweathogs' singing group wins the city-wide talent contest semi-finals. Then Barbarino becomes infatuated with one of their finals competitors. When they start dating, it jeopardizes the Sweathogs' chances of winning.

Barbarino makes up with the Sweathogs and gets the band back together. But when the judges found out Barbarino quit the band, they disqualified them from the contest.

When Woodman's contract for renewal is up, Kotter decides he wants to apply for vice principal. Then he has a dream that he is the king of Buchanan High School and the very old Sweathogs want to oust him from power.

Washington scores a 90 on his literature exam and Woodman accuses him of cheating. So to prove his innocence, Washington agrees to to take a make-up test.

Epstein paints a mural of a nude woman on the wall of the school, using the image of Julie Kotter as his inspiration.

Merriment, mistletoe and menorahs are the beginnings of a Merry Christmas celebration with the Sweathogs and Gabe and Julie Kotter.

Sweathogs tapping at the window for breakfast, coupled with the love, attention and time Mr. Kotter lavishes upon his students finally drive the neglected Julie to leave Gabe. Meanwhile, Kotter's classroom lesson on democracy goes awry when the Sweathogs vote Barbarino out and Freddie in as their new leader, provoking the rejected Vinnie to drop out of school.

Mr. Kotter seeks to reconcile with Julie, Freddie's leadership of the Sweathogs evokes the adage of absolute power corrupting absolutely and Barbarino weighs humility versus being a high school dropout and door-to-door Tidy-Didy cleanser salesman.

The new girl in Kotter's class declares that she is going to become a Sweathog, but the other Sweathogs strongly oppose her joining their group. So she pulls a stunt to prove her worth which backfires getting the Sweathogs nearly expelled.