Written by David Greenwalt ~ Directed by Bruce Seth Green
At the Bronze, Buffy meets up with Angel who again warns her of another demon. She notices a scar on his arm and he tells her to watch herself around 'fork guy' or else he'll rip her throat out. He gives her his leather coat and then leaves. The next day in biology class, Dr. Gregory tells Buffy that he wants to prove everyone who doubts her ability to succeed in school wrong.
The next day, Dr. Gregory is missing and a substitute new teacher, Ms. Natalie French is assigned to teach the class. She is gorgeous and practically every guy in school falls head over heals for her. During class, she asks for volunteers to help her make egg sacks like those of the Praying Mantis. Blaine, a school jock gets assigned to help the first day and Xander the next day. Later that night, Buffy goes hunting for 'fork guy' in the park. When she finds him, they fight and then he runs off before she can stake him. As she's heading home, she spots the vampire moving in to attack Ms. French, but he runs away when she turns around and looks at him. Buffy is really confused and has no clue why the vampire would be scared of her.
At school the following day, Buffy arrives late to Biology class. As she peers through the window on the door, Ms. French senses her presence and turns her head completely around to see her. Buffy is freaked and runs off. After Willow joins up with Buffy, the rush to the library to tell Giles about what happened. Buffy tries to convince them of what she saw, but neither believes her at first. Buffy then does some research and finds that Ms. French is actually a giant praying mantis. Giles calls a friend he knew who encountered the same creature and finds that the only way to kill it is to dismember it. Buffy tells Giles to record bat sonar which makes the praying mantis's nervous system go to hell while she heads off to go warn Xander.
Meanwhile, Xander goes over to Ms. French's house to work on the egg sacks. Instead, he is drugged and locked up in a cage in the basement. When he wakes up, Blaine is locked up next to him and they are watching the she-mantis prepare egg sacks. Blaine informs Xander that he's already seen her take this guy, lay her eggs, mate with him and bite of the head of her mate. Xander is chosen to go first and tries to make an escape. He fails and is dragged back and tied up.
Buffy, Willow and Giles reach the house of Ms. French which the got the address from school records and finds that the she-mantis used a retired teacher's records to get into the school. Buffy goes down into the sewers to find the fork vampire and he leads them to the she-mantis's house. Buffy then stakes him. Buffy crashes through the window of the basement and saves Xander and Blaine. Giles plays the bat sonar and Buffy chops the mantis to pieces. After all is done, Willow just happens to mention the fact that the mantis only chooses virgins.
Later at the Bronze, Angel shows up to congratulate Buffy on slaying the vampire. She offers his jacket back but he tells her, "Keep it. It looks better on you." The next day in biology, there is a new, strict teacher who takes the place of Dr. Gregory. Buffy picks up Dr. Gregory's glasses and puts them away in the closet. We then see a sack of hatching eggs under one of the shelves.
