Welcome Back, Kotter is an American sitcom starring Gabe Kaplan as a high-school teacher in charge of a racially and ethnically diverse remedial education class nicknamed the Sweathogs. Recorded in front of a live studio audience, the series aired on ABC from September 9, 1975, through May 17, 1979. It provided John Travolta with his breakthrough role. #ppology #popologist #welcomebackkotter #johntravolta #70stv | POPOLOGY