'Welcome Back, Kotter' Cast: Where Are They Now?

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. (ABC via Getty Images)