Andrew and Zelda break with their respective traditions and decide to throw a joint Halloween party, much to the dismay of Stu and Stephie, who feel like they are losing their best friends. Meanwhile, with Big Bird looking for a solid promotional opportunity to boost the profile of the company, Henry takes it upon himself to enlist the help of Ray Parker Jr.to attend their annual Wallflower Halloween party.

Cast: Americus Abesamis, Vivian Bang, Patrick Carlyle, Hong Chau, Parvesh Cheena, Lenora Crichlow, Ben Falcone, Ben Feldman, Nancy Friedrich, Guerrin Gardner, Christina Kirk, Trevor Larcom, Cristin Milioti, Ray Parker Jr., Hunter Payton