4. Beauty and the Beasts

Complete story — includes the ending

Giles reveals that a student was mauled to death overnight. Oz is a prime suspect, as a window to Oz's cage was open. Willow collects a hair sample from the victim, hoping to determine who killed him, but the test is inconclusive. That night, Buffy is attacked by a rabid Angel. She subdues him and chains him up. Buffy visits the school counselor, but finds him dead. Pete loses his temper with girlfriend Debbie over a bottle with a green liquid inside. He transforms into a monster and attacks Debbie, but relents, blaming her for angering him. Oz notes that all victims are connected to Debbie. Now suspecting Pete, Buffy and Willow approach her, but Debbie, who has been physically and psychologically abused, blames herself for Pete's anger. Pete visits Oz, transforms into a monster, and attacks. Oz is overpowered until he turns into a werewolf, turning the tables. Debbie stops Buffy from stunning Pete, who escapes. Later, Pete kills Debbie and overpowers Buffy. On the verge of killing her, Angel, who has broken free, intervenes and saves her, and reveals that he remembers her. Buffy keeps Angel's return a secret.