|The canonicity of this article's subject remains dubious. Though it doesn't contradict official continuity, it has not been referenced in any confirmed canonical material.|
- "For each generation… there is only one slayer."
The "History of the Slayer" (unofficial name) were promotional clips produced by the WB for Buffy the Vampire Slayer TV series. Aired either in the weeks or just prior to the series’ debut, they introduced the Slayer mythology narrating certain activities of various Slayers in the United States.
For the unaired pilot, the narrator concludes with "1996. A small campus in Southern California. It's started all over again," followed by various scenes of the episode.
In the official premiere, however, it says "Now, in 1997, it's started all over again." Interleaved with characters' speeches and scenes from the episode, it adds: "Something strange is happening in Sunnydale. A force so powerful, so menacing... There will be one person in all the world who dares to challenge it. Now, to the Chosen One. For each generation… there is only one slayer. Anthony Stewart Head, Alyson Hannigan, Nicholas Brendon, and Emmy Award winner Sarah Michelle Gellar. The moment is near, you are about to meet the Slayer." The trailer ends with the line: “And now, the series premiere of Buffy the Vampire Slayer,” only altered to “Now, a special weekend presentation of Buffy the Vampire Slayer.” in the episode first reprise.