Welcome Back, Kotter was launched as a vehicle for the funnyman, and he appeared in nearly every episode over its four-season ...

Gabe Kotter is a high-school teacher with a bunch of unruly students in his class. The student troublemakers are led by Vinnie Barbarino, who has a knack for rhyming insults.

"Welcome Back, Kotter" was a staple on ABC for much of its four-season run. Popular with kids and teenagers, the talented "Welcome Back, Kotter" cast was notable for bringing big screen star John ...