Recap: Buffy The Vampire Slayer S 4 E 18 Where The Wild Things Are

Buffy: Right, that thing that we can squeeze in before. We gotta go.
Willow: They probably mean—
Giles: I know what they mean. I did go to university in the Mesozoic era.

The spirits of sexually repressed teens are wreaking havoc in Riley's frat house.