Special Guest Stars Felicia Day as Poppy Kline Guest Stars Mageina Tovah as Zelda Schiff Daniel Nemes as Gavin Marlee Matlin as Harriet Schiff Harvey Guillén as Benedict Pickwick Jaime Ray Newman as Irene McAllistair Hannah Levien as Victoria Gradley Roan Curtis as Sylvia Anja Savcic as Skye Stephanie Nogueras as Harriet 20-something Co Starring William C. Vaughan as Underworld Park Ranger Melanie Chan as Maribel Winter Sluyter-Obidos as Young Harriet Uncredited Olivia Taylor Dudley as Cassandra