 The school's principal was perpetually absent, while the uptight vice principal dismissed the Sweathogs as worthless hoodlums and only expected Kotter to attempt to control them until they inevitably dropped out.Ninety-five episodes were produced during "Welcome Back, Kotter"s four-year run.The show's producers did not know for certain that the show would be cancelled after the 1978–79 season due to declining ratings.