Gabe Kaplan Gabe Kotter Actor 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 Amy Johnston Guest Star Martin Garner Guest Star Daniel Chodos Guest Star James Komack Executive Producer Nick Arnold Producer, Writer George Arthur Bloom Producer Bob Claver Director Peter Meyerson Writer