Episode 74 of "Buffy, the Vampire Slayer"
s04e18 Where the Wild Things Are
Title: Where the Wild Things Are
Original Air Date: 04/25/2000 on WB
Director: David Solomon
Writer: Tracey Forbes
Guest Stars: Bryan Cuprill (Roy), Neil Daly (Mason), Danielle Pessis (Christie), Jeffrey Sharmay (Drowning Boy), Jeff Wilson (Evan), Casey McCarthy (Julie), Kathryn Joosten (Mrs. Holt), James Michael Connor (Scientist)
Plot Outline:
Buffy and Riley are spending all their time in bed (and they're not sleeping). Their round-the-clock exploration of each other awakens the spirits of children who were sexually repressed by their foster mother back when Lowell House was a home for orphaned and runaway kids. Willow, Giles and Tara divert the angry children while Xander and Anya go to try and stop Buffy and Riley.