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 Vernee Watson Guest Star Debralee Scott Guest Star James Komack Executive Producer Alan Sacks Producer Bob LaHendro Director William Raynor Writer Myles Wilder Writer