Lawyers have driven a stake into the “Buffy the Vampire Slayer” sing-along.

The TV show didn’t exactly die when the show and its demon-fighting heroine went off the air three years ago. Driven by a fiercely loyal following, fans put together the sing-along event, a la “Rocky Horror Picture Show,” where people turn up for midnight screenings of a musical episode of the show, often dressed up in costume as their favorite characters.