Guest Stars Nathalie Boltt as Penelope Blossom Tiera Skovbye as Polly Cooper Barclay Hope as Clifford Blossom Karl Walcott as Clay Walker Nicholas Barasch as Julian Blossom William MacDonald as Principal Featherhead Malcolm Stewart as Dr. Freiderich Werthers Garry Chalk as Al Fieldstone Sarah Habel as Geraldine Grundy Alaina Huffman as Twyla Twyst Co Starring Beverley Breuer as Sister Woodhouse Alyssa Wapanatâhk as Lizzo