Gabe Kotter, played by Gabe Kaplan, a former Sweathog, returned to his Brooklyn high school to teach a new class of delinquents. "Welcome Back, Kotter" was wildly popular during its years on the air from 1975 to 1979. From left: Robert Hegyes, Lawrence-Hilton Jacobs, John Travolta and Ron Palillo. Click through to see what the stars of the show are up to now.
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