Episode 55 of "Buffy, the Vampire Slayer"
s03e21 Graduation Day (1/2)
Title: Graduation Day (1/2)
Original Air Date: 05/18/1999 on WB
Director: Joss Whedon
Writer: Joss Whedon
Guest Stars: James Lurie (Mr Miller), Hal Robinson (Lester), Adrian Neil (Vamp Lackey #1), John Rosenfeld (Vamp Lackey #2)
Plot Outline:
The gang receive some valuable information from old enemy Anya who has actually witnessed an Ascension. She reveals that the Mayor plans to transform himself into pure demon, something that has not been seen for thousands of years. When Angel is poisoned by Faith to distract Buffy, Buffy faces Faith for the final time in order to get the only cure to the poison: Faith's blood.