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

Buffy discovers Angel's dark secret and hesitates to do anything about it, which could spell danger for someone she loves.

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

Buffy and Cordelia inadvertently attend a frat party hosted by a murderous cult.

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

A charismatic Slayer visits Sunnydale and wins over many of Buffy's friends. Meanwhile, two powerful vampires plot an attack.

As Buffy and Cordelia vie for Homecoming Queen, a group of killers gather to participate in SlayerFest '98.