AllMovie

In classic horror movie style, Xander (Nicholas Brendon) and Cordelia (Charisma Carpenter) are attacked by a werewolf while making out in a car. Soon, Buffy (Sarah Michelle Gellar) runs into a hunter named Cain who wants the werewolf's pelt. After a high school girl named Theresa is found killed, Oz (Seth Green) begins to act weird. Suspicious, Buffy goes to Oz's house to confront him and finds him turning into a werewolf. Oz's dog days seem numbered until Theresa reappears as a vampire bearing greetings from none other than Angel (David Boreanaz). Interestingly, Oz's newly discovered lycanthropy actually brings him and Willow (Alyson Hannigan) closer as they start dating.