Sam Bobrick Creator 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 Jordan Christopher Michael Billy Guest Star Ernie Sabella Leon Carosi Guest Star Leah Remini Stacey Carosi Guest Star Denise Richards Cynthia Guest Star Peter Engel Executive Producer Ronald B. Solomon Writer Brett Dewey Writer Don Barnhart Director Franco Bario Producer Bennett Tramer Producer