Gabe Kaplan Gabe Kotter Actor, Writer Marcia Strassman Julie Kotter Actor John Sylvester White Mr. Michael Woodman Actor Robert Hegyes Juan Epstein Actor Lawrence-Hilton Jacobs Freddie "Boom Boom" Washington Actor Ron Palillo Arnold Horshack Actor John Travolta Vinnie Barbarino Actor Jack Dodson Guest Star Alice Backes Guest Star James Komack Executive Producer Bob Claver Director Nick Arnold Producer George Arthur Bloom Producer