S4 E1 • The Drop-Ins (1)

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.

Première diffusion : 11 septembre 1978

S4 E2 • The Drop-Ins (2)

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.

Première diffusion : 11 septembre 1978

S4 E3 • Beau's Jest

A new student, Beau De Labarre, sets up Epstein with a bad date.

Première diffusion : 18 septembre 1978

S4 E4 • Don't Come Up and See Me Sometime

Vinnie throws the Sweathogs out of his new apartment.

Première diffusion : 25 septembre 1978

S4 E5 • Once Upon a Ledge

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

Première diffusion : 2 octobre 1978

S4 E6 • The Sweatmobile

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

Première diffusion : 9 octobre 1978

S4 E7 • Barbarino's Boo-Boo

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

Première diffusion : 21 octobre 1978

S4 E8 • X-Rated Education

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.

Première diffusion : 28 octobre 1978

S4 E9 • The Barbarino Blues

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

Première diffusion : 4 novembre 1978

S4 E10 • Washington's Clone

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

Première diffusion : 11 novembre 1978

S4 E11 • Frog Day Afternoon

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

Première diffusion : 25 novembre 1978

S4 E12 • A Little Fright Music

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

Première diffusion : 2 décembre 1978

S4 E13 • A Winter's Coat Tail

Vinnie is saddened when his new coat is stolen.

Première diffusion : 16 décembre 1978

S4 E14 • Bride and Gloom

Juan asks Vinnie to marry his immigrant cousin.

Première diffusion : 13 janvier 1979

S4 E15 • Barbarino's Baby

Vinnie is forced to deliver a baby in an elevator.

Première diffusion : 3 février 1979

S4 E16 • The Goodbye Guy

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.

Première diffusion : 10 février 1979

S4 E17 • Come Back, Little Arnold

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.

Première diffusion : 24 février 1979

S4 E18 • The Sweat Smell of Success

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.

Première diffusion : 3 mars 1979

S4 E19 • The Gang Show

Freddie and Juan plan to do an act together for the upcoming talent contest, while Carvelli has some bribed judges up his sleeves. Arnold and Beau take over as judges, leaving Murray in the third spot.

Première diffusion : 17 mars 1979

S4 E20 • Oo, Oo, I Do (1)

Arnold's relationship with Mary gets serious. Then he finds out he has to move and leave the school. Upset, Arnold decides to propose marriage to Mary. She accepts.

Première diffusion : 25 mai 1979

S4 E21 • Oo, Oo, I Do (2)

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.

Première diffusion : 25 mai 1979

S4 E22 • I'm Okay, But You're Not

Beau plays a number of pranks on Mr. Woodman.

Première diffusion : 1 juin 1979

S4 E23 • The Breadwinners

While Horshack adjusts the 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.

Première diffusion : 8 juin 1979