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 Irene Arranga Guest Star Georganne LaPiere Guest Star Stephen Shortridge Guest Star Charles Fleischer Guest Star Della Reese Guest Star Alston Ahern Guest Star Sip Culler Guest Star Ellen Travolta Guest Star Bob Harcum Guest Star Linda McCullough Guest Star Jane Dulo Guest Star Dick Winslow Guest Star Priscilla Morrill Guest Star James Komack Executive Producer Bill Richmond Producer, Writer Gene Perret Producer, Writer Rick Hawkins Writer Liz Sage Writer Earl Barret Writer Linda Morris Writer Susanne Gayle Harris Writer Kathy Greer Writer Norman Abbott Director George Arthur Bloom Writer Vic Rauseo Writer Bill Greer Writer