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 Ruth Buzzi Roberta Powers Guest Star Tori Spelling Violet Bickerstaff Guest Star Jeffrey Asch Maxwell Nerdstrom Guest Star Peter Engel Executive Producer Franco Bario Producer Bennett Tramer Producer Don Barnhart Director Brett Dewey Writer Ronald B. Solomon Writer