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 Susan Beaubian Dr. Turtle Guest Star Peter Engel Executive Producer Franco Bario Producer Bennett Tramer Producer Jeffrey J. Sachs Writer Don Barnhart Director