Welcome Back Kotter was based on Gabe Kaplan's standup routine which in turn was based on his teenage days growing up in Brooklyn. The show was basically Mr. Kaplan doing his standup routine but as the teacher with his students, The Sweathogs, providing punch lines that became catch phrases such as "up your nose with a rubber hose". The show made a star of a then unknown John Travolta. The shows first two seasons were classics, but it began to lose steam in the third season and the final season was a washout as Mr. Travolta was a major star by then and skipped a lot the episodes and Mr. Kaplan was in a contract dispute that limited his appearances.
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