Guest Stars Matthew Glave as Xander Hall Alex Désert as Curtis Marsha Thomason as Mer Kodis Doug Jones as Monster Kris Marshall as Tibor Janina Gavankar as Nikki Kharolina Gold as Make-Up Lady John Pirruccello as Riley's Dad Artemis Pebdani as Shak's Mom Charlie Robinson as Sylvester Bellina Logan as Mrs. Fornges