Mark-Paul Gosselaar Zack Morris Actor Tiffani Thiessen Kelly Kapowski Actor Mario López A.C. Slater Actor Elizabeth Berkley Lauren Jessie Spano Actor Dustin Diamond Samuel 'Screech' Powers Actor Lark Voorhies Lisa Turtle Actor Dennis Haskins Mr. Richard Belding Actor Ed Alonzo Max Guest Star Kirsten Kemp Rhonda Robistelli Guest Star Patrick Thomas O'Brien Mr. Dewey Guest Star Carol Lawrence Miss Wentworth Guest Star Jack Angeles Mr. Tuttle Guest Star William Joseph Barker Nerd 2 Guest Star Mark Clayman Stan Clegg Guest Star Barbara Tyson Herself Guest Star Henry Brown Mr. Turtle Guest Star Hamilton Camp Mr. Margolies Guest Star Pamela Kosh Mrs. Simpson Guest Star Margaret Thatcher Herself Guest Star Mikhail Gorbachev Himself Guest Star Peter Engel Executive Producer, Writer Franco Bario Producer Bennett Tramer Producer, Writer Don Barnhart Director Tom Tenowich Writer Scott Spencer Gordon Writer R.J. Colleary Writer Larry Balmagia Writer Michael Poryes Writer Brett Dewey Writer Jeffrey J. Sachs Writer Michael Swerdlick Writer Mark Fink Writer Gary Shimokawa Director Dennis Erdman Director Ronald B. Solomon Writer