Special Guest Stars Erinn Westbrook as Tabitha Tate Guest Stars Martin Cummins as Tom Keller Nathalie Boltt as Penelope Blossom Lochlyn Munro as Hal Cooper Ryan Robbins as Frank Andrews Molly Ringwald as Mary Andrews Daniel Yang as Dilton Doiley Barclay Hope as Clifford Blossom Abby Ross as Midge Klump Sean Depner as Bret Weston Wallis Karl Walcott as Clay Walker Nicholas Barasch as Julian Blossom William MacDonald as Principal Featherhead Malcolm Stewart as Dr. Freiderich Werthers Co Starring Alyssa Wapanatâhk as Lizzo Stewart Prince as Alum #1 Dennis