Big Wolf on Campus (1999)

S1E15 Fangs for the Memories

At the annual Blood Drive, Tommy signs up to donate. But when a pack of vampires shows up in Pleasantville and starts crowding Stacey, Tommy steps in to protect her. Later, Merton reveals a shocking truth: Tommy’s donation contains wolf blood. The two race back to the drive to retrieve the bag, only to find the vampires already there. Now they must stall the bloodsuckers long enough to hatch a new plan to take them down.