Buffy's biology teacher is killed by a giant praying mantis that assumes the form of a beautiful substitute teacher.

Xander and several other students are possessed by the spirit of a demonic breed of hyenas that wreak havoc at the high school.

A series of strange occurrences lead Buffy and her friends to discover that their worst nightmares have literally become reality.

Two science club nerds use body parts to create the "perfect girlfriend" for a teenager who has been brought back from the dead.

On Halloween, Buffy and her friends patronize an unusual costume shop where customers turn into whatever costume they are wearing.

Giles' past comes back to haunt him as a demon he and Ethan Rayne summoned in their wild youth seeks them out in Sunnydale.

Buffy's mom introduces her new boyfriend, who charms everyone except Buffy. When she confronts his dark side, she is left questioning her actions.

Buffy and her friends discover secrets about themselves as they battle a werewolf, its hunter, and their own emotions.