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 Benjamin King Craig Strand Guest Star Ernie Sabella Leon Carosi Guest Star Leah Remini Stacey Carosi Guest Star Peter Engel Executive Producer Jeffrey J. Sachs Writer Don Barnhart Director Franco Bario Producer Bennett Tramer Producer